Route production agents between Claude Sonnet 5 and DeepSeek V4 Pro
Claude Sonnet 5 vs DeepSeek V4 Pro: which should I use?
Deploy Claude Sonnet 5 and DeepSeek V4 Pro together through hybrid escalation routing: use DeepSeek as a cost-efficient first-pass engine with Sonnet fallback for complex edge cases. Verified 2026-09-07; unmeasured task benchmarks fail closed.
Verified 2026-09-07
Where can you find price, speed, and task evidence for Claude Sonnet 5 and DeepSeek V4 Pro?
Which tasks fit Claude Sonnet 5 and DeepSeek V4 Pro?
Best-fit task signals from the published model strengths; this is not a substitute for a controlled benchmark.
| Fact | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| Best fit | Production workloads that need near-Opus quality with better speed and cost. | Rigorous math, proofs, and hard algorithmic problems on a budget. |
| Reasoning mode | Available | Available |
What does a Coding Agent workload cost with Claude Sonnet 5 and DeepSeek V4 Pro?
Modeled for Coding Agent: 20,000 input + 2,000 output tokens per task, 1 turn. This is a workload model, not a provider quote.
| Fact | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| Coding Agent / task | $0.06 (modeled) | $0.03 (modeled) (winner) |
| Input / output rate | $2.00 / $10.00 per M | $1.32 / $3.96 per M |
How fast are Claude Sonnet 5 and DeepSeek V4 Pro?
Only non-estimated benchmark results are shown as measured.
| Fact | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| Measured throughput | Unavailable | 68 tokens/s |
| Time to first token | Unavailable | 480 ms |
How compatible are Claude Sonnet 5 and DeepSeek V4 Pro with APIs?
Provider-level wire-format and SDK facts; model-specific parameter differences may still apply.
| Fact | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| OpenAI SDK | Not drop-in | Usable |
| Request shape | Messages API — system prompt is a top-level field, not a message role, and max_tokens is required on every call. | OpenAI-compatible chat/completions; set model to a deepseek-* id and point base_url at api.deepseek.com. |
| Streaming | SSE (Anthropic content-block events) | SSE (OpenAI delta) |
What are the privacy and retention policies for Claude Sonnet 5 and DeepSeek V4 Pro?
Provider policy and residency facts from the verified provider registry. A missing retention policy is not treated as a guarantee.
| Fact | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| Provider says API data trains models | No | Unavailable |
| Published retention period | Unavailable | Unavailable |
| Data residency | Unavailable | Unavailable |
How much effort does it take to migrate between Claude Sonnet 5 and DeepSeek V4 Pro?
Direction is from each displayed model to the other. Effort is derived from provider compatibility and published parameter maps.
| Fact | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| Move Claude Sonnet 5 → DeepSeek V4 Pro | config; 3 breaking parameter differences | Target: DeepSeek V4 Pro |
| Move DeepSeek V4 Pro → Claude Sonnet 5 | Source: DeepSeek V4 Pro | code-change; 3 breaking parameter differences |
| Why | Keep the `openai` SDK; change `baseURL` and the API key. | Messages API — system prompt is a top-level field, not a message role, and max_tokens is required on every call. |
Claude Sonnet 5 vs DeepSeek V4 Pro DeepSeek-first supervised routing
Formula: expected bill = DeepSeek-first share × DeepSeek bill + Sonnet retry share × (DeepSeek first pass + Sonnet retry); routing is not averaged symmetrically.
| Sonnet retry share | Expected routed bill | DeepSeek-first path |
|---|---|---|
| 0% | $0.055440 | $0.055440 + 0% × $0.100000 |
| 10% | $0.065440 | $0.055440 + 10% × $0.100000 |
| 25% | $0.080440 | $0.055440 + 25% × $0.100000 |
| 50% | $0.105440 | $0.055440 + 50% × $0.100000 |
Verified 2026-08-14. Pricing provenance: Claude Sonnet 5 pricing (2026-08-14); DeepSeek V4 Pro pricing (2026-08-14). Capability: Claude Sonnet 5; DeepSeek V4 Pro. Provider: Anthropic; DeepSeek. Missing evidence is Unavailable, never inferred.
Claude Sonnet 5 vs DeepSeek V4 Pro UTC traffic-allocation bill
Formula: DeepSeek peak = 01:00–04:00 and 06:00–10:00 UTC; off-peak is every other UTC hour after the documented effective time. Sonnet has no DeepSeek schedule.
| Allocation | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| Peak/standard | $2.000000 input / $10.000000 output per M (standard/peak) | $1.320000 input / $3.960000 output per M (standard/peak); $0.085800 |
| Off-peak | Unavailable | $0.660000 input / $1.980000 output per M (off-peak); $0.042900 |
| 50/50 peak/off-peak mix | Unavailable | $0.064350; peak 01:00-04:00, 06:00-10:00 UTC |
DeepSeek schedule source: https://api-docs.deepseek.com/quick_start/pricing. Cache hit rates are not applied without a measured hit-share assumption.
Verified 2026-08-14. Pricing provenance: Claude Sonnet 5 pricing (2026-08-14); DeepSeek V4 Pro pricing (2026-08-14). Capability: Claude Sonnet 5; DeepSeek V4 Pro. Provider: Anthropic; DeepSeek. Missing evidence is Unavailable, never inferred.
Claude Sonnet 5 vs DeepSeek V4 Pro launch-readiness evidence ledger
Formula: no quality winner until both sides have the same prompt, grader, run count and acceptance floor; every required workload is represented.
| Shared suite | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| Structured output | Unavailable; premium Unavailable | 82/100; 64 in / 207 out; 2336 ms; $0.000208; run 2026-06-16T20:31:30.728Z; premium Unavailable |
| Coding | Unavailable; premium Unavailable | 82/100; 64 in / 207 out; 2336 ms; $0.000208; run 2026-06-16T20:31:30.728Z; premium Unavailable |
| Tool recovery | Unavailable; premium Unavailable | 82/100; 64 in / 207 out; 2336 ms; $0.000208; run 2026-06-16T20:31:30.728Z; premium Unavailable |
| Speed / TTFT | Unavailable | 68 tokens/s; TTFT 480 ms; p95 62.56 tokens/s; n=5 |
| Prompt/grader/count | Exact matched prompt + grader + 5+ runs required | Exact matched prompt + grader + 5+ runs required |
| Promotion gate | User acceptance floor + rollback | User acceptance floor + rollback |
Verified 2026-08-14. Pricing provenance: Claude Sonnet 5 pricing (2026-08-14); DeepSeek V4 Pro pricing (2026-08-14). Capability: Claude Sonnet 5; DeepSeek V4 Pro. Provider: Anthropic; DeepSeek. Missing evidence is Unavailable, never inferred.
Batch 60 · exact-pair decision contributions · verified 2026-09-07
Exact pair boundary: Anthropic / DeepSeek; model endpoint, escalation routing, off-peak rates, cache support, and test observations must join. Requested models are claude-sonnet-5 and deepseek-v4-pro. Provider, rate, pricing, and task pages remain fact owners.
Supervised-versus-autonomous routing model
Frozen Batch 60 scenario board. Formula / deterministic rule: effective_cost = (1 - escalation_rate) * deepseek_cost + escalation_rate * (deepseek_cost + sonnet_cost) Boundary: Owns hybrid tiered agent routing economics.
| Frozen scenario / field ID | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m1-r10% direct execution (pure DeepSeek) | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=0% direct execution (pure DeepSeek); routing strategy; escalation percentage; DeepSeek base cost; Sonnet fallback cost; blended cost; recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 0% direct execution (pure DeepSeek) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m1-r210% edge-case escalation | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=10% edge-case escalation; routing strategy; escalation percentage; DeepSeek base cost; Sonnet fallback cost; blended cost; recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 10% edge-case escalation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m1-r325% complex task escalation | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=25% complex task escalation; routing strategy; escalation percentage; DeepSeek base cost; Sonnet fallback cost; blended cost; recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 25% complex task escalation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m1-r450% heavy validation routing | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=50% heavy validation routing; routing strategy; escalation percentage; DeepSeek base cost; Sonnet fallback cost; blended cost; recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 50% heavy validation routing is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m1-r5100% direct execution (pure Sonnet) | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=100% direct execution (pure Sonnet); routing strategy; escalation percentage; DeepSeek base cost; Sonnet fallback cost; blended cost; recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 100% direct execution (pure Sonnet) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m1-r6unresolved escalation trigger | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=unresolved escalation trigger; routing strategy; escalation percentage; DeepSeek base cost; Sonnet fallback cost; blended cost; recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unresolved escalation trigger has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: DeepSeek API pricing; verification date 2026-09-07. Missing or conflicting joins fail closed.
UTC traffic-allocation and off-peak bill envelope
Frozen Batch 60 scenario board. Formula / deterministic rule: bill = standard_hours * peak_rate + off_peak_hours * off_peak_rate; DeepSeek off-peak discount applies 16:30-00:30 UTC Boundary: Owns scheduled batch and off-peak cost analysis.
| Frozen scenario / field ID | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m2-r124h uniform production load | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=24h uniform production load; time window; traffic distribution; DeepSeek peak cost; DeepSeek off-peak cost; Sonnet standard cost; net savings; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 24h uniform production load is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m2-r2US business hours concentration | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=US business hours concentration; time window; traffic distribution; DeepSeek peak cost; DeepSeek off-peak cost; Sonnet standard cost; net savings; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — US business hours concentration is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m2-r3off-peak scheduled batch processing | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=off-peak scheduled batch processing; time window; traffic distribution; DeepSeek peak cost; DeepSeek off-peak cost; Sonnet standard cost; net savings; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — off-peak scheduled batch processing is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m2-r4prompt-cached repetitive queries | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=prompt-cached repetitive queries; time window; traffic distribution; DeepSeek peak cost; DeepSeek off-peak cost; Sonnet standard cost; net savings; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — prompt-cached repetitive queries is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m2-r5burst traffic anomaly | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=burst traffic anomaly; time window; traffic distribution; DeepSeek peak cost; DeepSeek off-peak cost; Sonnet standard cost; net savings; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — burst traffic anomaly is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m2-r6unsupported schedule window | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=unsupported schedule window; time window; traffic distribution; DeepSeek peak cost; DeepSeek off-peak cost; Sonnet standard cost; net savings; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unsupported schedule window has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: DeepSeek API pricing; verification date 2026-09-07. Missing or conflicting joins fail closed.
Launch-readiness evidence and test suite ledger
Frozen Batch 60 scenario board. Formula / deterministic rule: ready = structured_output_verified && coding_verified && tool_recovery_tested; missing run => Untested Boundary: Owns pre-deployment empirical verification checklist.
| Frozen scenario / field ID | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m3-r1JSON schema extraction fidelity | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=JSON schema extraction fidelity; verification milestone; Sonnet evidence; DeepSeek evidence; empirical status; launch gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — JSON schema extraction fidelity is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m3-r2multi-file code refactor test | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=multi-file code refactor test; verification milestone; Sonnet evidence; DeepSeek evidence; empirical status; launch gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — multi-file code refactor test is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m3-r3tool-call error recovery test | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=tool-call error recovery test; verification milestone; Sonnet evidence; DeepSeek evidence; empirical status; launch gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — tool-call error recovery test is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m3-r4prompt caching compatibility | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=prompt caching compatibility; verification milestone; Sonnet evidence; DeepSeek evidence; empirical status; launch gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — prompt caching compatibility is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m3-r5concurrency throughput under load | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=concurrency throughput under load; verification milestone; Sonnet evidence; DeepSeek evidence; empirical status; launch gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — concurrency throughput under load is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-claude-sonnet-5-vs-deepseek-v4-pro-m3-r6unverified model configuration | pair=claude-sonnet-5 vs deepseek-v4-pro; provider=Anthropic / DeepSeek; hostA=api.anthropic.com; hostB=api.deepseek.com; surfaceA=Messages API; surfaceB=DeepSeek API; requested/effective IDs=claude-sonnet-5,deepseek-v4-pro; scenario=unverified model configuration; verification milestone; Sonnet evidence; DeepSeek evidence; empirical status; launch gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unverified model configuration is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
First-party provenance: Anthropic Claude model documentation; verification date 2026-09-07. Missing or conflicting joins fail closed.
Method and limitations: formulas are deterministic; observed and assumed inputs are labeled; no missing provider, host, account, region, realm, alias, snapshot, revision, weight, artifact, control, tool, modality, workload, rate-period, timestamp, or result is transferred. Run the claude-sonnet-5-vs-deepseek-v4-pro Batch 60 scenario →
How do Claude Sonnet 5 and DeepSeek V4 Pro compare on specs?
| Claude Sonnet 5 | DeepSeek V4 Pro | |
|---|---|---|
| Price (input) | $2.00/M | $1.32/M ✓ |
| Price (output) | $10.00/M | $3.96/M ✓ |
| Blended price | $4.00/M | $1.98/M ✓ |
| Context window | 500,000 tokens | 1,000,000 tokens ✓ |
| Max output | 64,000 tokens | 384,000 tokens ✓ |
| Modalities | text, vision | text |
| Reasoning mode | Yes | Yes |
| Released | 2026-06 | 2026-05 |
| Speed | Not measured | 68 t/s |
How much do Claude Sonnet 5 and DeepSeek V4 Pro cost at scale?
| Tokens / month | Claude Sonnet 5 | DeepSeek V4 Pro | Delta |
|---|---|---|---|
| 1,000,000 | $4.00 | $1.98 | $2.02 (2.0×) |
| 10,000,000 | $40.00 | $19.80 | $20.20 (2.0×) |
| 100,000,000 | $400.00 | $198.00 | $202.00 (2.0×) |
Choose Claude Sonnet 5 if…
- ✓Frontier intelligence at Sonnet economics
- ✓Fast interactive coding performance
- ✓Reliable structured output and extended thinking
- ✓Production workloads that need near-Opus quality with better speed and cost.
Choose DeepSeek V4 Pro if…
- ✓Thinking mode with visible chain-of-thought
- ✓Frontier-level math and competition coding
- ✓Still far cheaper than closed frontier models
- ✓Rigorous math, proofs, and hard algorithmic problems on a budget.
Run this exact matchup right now
Send the same prompt to Claude Sonnet 5 and DeepSeek V4 Pro side by side and see the outputs yourself.
Try Claude Sonnet 5 vs DeepSeek V4 Pro FreeWhat are common questions about Claude Sonnet 5 and DeepSeek V4 Pro?
Is Claude Sonnet 5 cheaper than DeepSeek V4 Pro?
DeepSeek V4 Pro is cheaper, at $1.98 per million blended tokens vs $4.00 for Claude Sonnet 5.
Which has the bigger context window, Claude Sonnet 5 or DeepSeek V4 Pro?
DeepSeek V4 Pro has the larger context window: 1,000,000 tokens vs 500,000.
Can Claude Sonnet 5 replace DeepSeek V4 Pro for coding?
Both are viable for coding. Frontier intelligence at Sonnet economics (Claude Sonnet 5) vs Thinking mode with visible chain-of-thought (DeepSeek V4 Pro) — pick based on which strength matters more for your workload.
Neither of these? See Claude Sonnet 5 alternatives or DeepSeek V4 Pro alternatives.
What related comparisons help choose between Claude Sonnet 5 and DeepSeek V4 Pro?
Claude Sonnet 5 pricingDeepSeek V4 Pro pricingvs Gemini 3.1 Provs Grok 4.3vs Claude Opus 4.8vs Claude Fable 5Premium model tests
Pricing verified 2026-08-14. Specs verified 2026-08-14.