Compare DeepSeek V4 Pro and GPT-5.6 Sol for reasoning workflows
DeepSeek V4 Pro vs GPT-5.6 Sol: which should I use?
Compare DeepSeek V4 Pro and GPT-5.6 Sol by evaluating vision requirements (Sol supported, DeepSeek text-only), output headroom (DeepSeek 384K vs Sol 128K), and calculating whether Sol’s quality uplift offsets its higher token pricing. Verified 2026-09-07.
Verified 2026-09-07
Where can you find price, speed, and task evidence for DeepSeek V4 Pro and GPT-5.6 Sol?
Which tasks fit DeepSeek V4 Pro and GPT-5.6 Sol?
Best-fit task signals from the published model strengths; this is not a substitute for a controlled benchmark.
| Fact | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| Best fit | Rigorous math, proofs, and hard algorithmic problems on a budget. | Complex, multi-step professional and coding work where accuracy matters more than cost. |
| Reasoning mode | Available | Available |
What does a Coding Agent workload cost with DeepSeek V4 Pro and GPT-5.6 Sol?
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 | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| Coding Agent / task | $0.03 (modeled) (winner) | $0.12 (modeled) |
| Input / output rate | $1.32 / $3.96 per M | $4.00 / $20.00 per M |
How fast are DeepSeek V4 Pro and GPT-5.6 Sol?
Only non-estimated benchmark results are shown as measured.
| Fact | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| Measured throughput | 68 tokens/s (winner) | 44 tokens/s |
| Time to first token | 480 ms | 560 ms |
How compatible are DeepSeek V4 Pro and GPT-5.6 Sol with APIs?
Provider-level wire-format and SDK facts; model-specific parameter differences may still apply.
| Fact | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| OpenAI SDK | Usable | Usable |
| Request shape | OpenAI-compatible chat/completions; set model to a deepseek-* id and point base_url at api.deepseek.com. | Canonical /chat/completions and /responses shape — every OpenAI-compatible provider on this site imitates it. |
| Streaming | SSE (OpenAI delta) | SSE (OpenAI delta) |
What are the privacy and retention policies for DeepSeek V4 Pro and GPT-5.6 Sol?
Provider policy and residency facts from the verified provider registry. A missing retention policy is not treated as a guarantee.
| Fact | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| Provider says API data trains models | Unavailable | No |
| Published retention period | Unavailable | Unavailable |
| Data residency | Unavailable | US by default; EU data residency available on enterprise agreements |
How much effort does it take to migrate between DeepSeek V4 Pro and GPT-5.6 Sol?
Direction is from each displayed model to the other. Effort is derived from provider compatibility and published parameter maps.
| Fact | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| Move DeepSeek V4 Pro → GPT-5.6 Sol | config; 0 breaking parameter differences | Target: GPT-5.6 Sol |
| Move GPT-5.6 Sol → DeepSeek V4 Pro | Source: GPT-5.6 Sol | config; 5 breaking parameter differences |
| Why | Keep the `openai` SDK; change `baseURL` and the API key. | Keep the `openai` SDK; change `baseURL` and the API key. |
DeepSeek V4 Pro vs GPT-5.6 Sol equal-1M-context workload gate
Formula: eligibility = input ≤ contextWindow AND output ≤ maxOutput AND requested modality is supported; cost comparison happens after this gate.
| Requirement | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| 1M text / 128K output | Eligible; context 1,000,000; max output 384,000; cost $1.826880 | Eligible; context 1,000,000; max output 128,000; cost $6.560000 |
| 1M text / 384K output | Eligible; context 1,000,000; max output 384,000; cost $2.840640 | Excluded; context 1,000,000; max output 128,000; cost Unavailable |
| Vision | Unavailable | Eligible |
Verified 2026-08-14. Pricing provenance: DeepSeek V4 Pro pricing (2026-08-14); GPT-5.6 Sol pricing (2026-08-14). Capability: DeepSeek V4 Pro; GPT-5.6 Sol. Provider: DeepSeek; OpenAI. Missing evidence is Unavailable, never inferred.
DeepSeek V4 Pro vs GPT-5.6 Sol accepted-result and defect-loss crossover
Formula: accepted-result cost = base bill × (1 + retry penalty); break-even defect loss = price delta ÷ user-supplied success uplift. Neither probability is assigned.
| Workload | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| Coding: 50K in / 8K out | $0.097680; retry rA user | $0.360000; retry rB user |
| Reasoning: 100K in / 16K out | $0.195360 | $0.720000 |
| Crossover | Δprice ÷ user uplift | Δprice ÷ retry penalty |
| Matched evidence | 82/100; 64 in / 207 out; 2336 ms; $0.000208; run 2026-06-16T20:31:30.728Z; premium Unavailable | Unavailable; premium Unavailable |
Verified 2026-08-14. Pricing provenance: DeepSeek V4 Pro pricing (2026-08-14); GPT-5.6 Sol pricing (2026-08-14). Capability: DeepSeek V4 Pro; GPT-5.6 Sol. Provider: DeepSeek; OpenAI. Missing evidence is Unavailable, never inferred.
DeepSeek V4 Pro vs GPT-5.6 Sol matched canary design
Formula: duplicate-run cost = staged traffic × [bill(DeepSeek) + bill(Sol)]; exact staged costs are rendered for 1%, 5%, 10%, and 25% traffic.
| Stage | DeepSeek cost | Sol cost | Duplicate total |
|---|---|---|---|
| 1% | $0.000977 | $0.003600 | $0.004577 |
| 5% | $0.004884 | $0.018000 | $0.022884 |
| 10% | $0.009768 | $0.036000 | $0.045768 |
| 25% | $0.024420 | $0.090000 | $0.114420 |
| Canary field | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| Measured speed / TTFT | 68 tokens/s; TTFT 480 ms; p95 62.56 tokens/s; n=5 | 44 tokens/s; TTFT 560 ms; p95 35.64 tokens/s; n=5 |
| Cheap-test observation | 82/100; 64 in / 207 out; 2336 ms; $0.000208; run 2026-06-16T20:31:30.728Z | Unavailable |
| Premium task run | Unavailable | Unavailable |
| Promotion / rollback | Matched prompt uplift and defect-loss threshold required | Matched prompt uplift and defect-loss threshold required |
Verified 2026-08-14. Pricing provenance: DeepSeek V4 Pro pricing (2026-08-14); GPT-5.6 Sol pricing (2026-08-14). Capability: DeepSeek V4 Pro; GPT-5.6 Sol. Provider: DeepSeek; OpenAI. Missing evidence is Unavailable, never inferred.
Batch 60 · exact-pair decision contributions · verified 2026-09-07
Exact pair boundary: DeepSeek / OpenAI; model endpoint, 1M context parity, 384K vs 128K max output, vision requirement, and defect loss must join. Requested models are deepseek-v4-pro and gpt-5.6-sol. Provider, rate, pricing, and task pages remain fact owners.
Equal-1M-context workload gate and output envelope
Frozen Batch 60 scenario board. Formula / deterministic rule: eligible = (vision_needed ? Sol : Both) && (output <= 128K ? Both : (output <= 384K ? DeepSeek : Excluded)) Boundary: Owns capability gating for 1M context tasks.
| Frozen scenario / field ID | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m1-r1text reasoning (250K input, 32K output) | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=text reasoning (250K input, 32K output); task type; input tokens; output tokens; vision required; DeepSeek fit; Sol fit; workload gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — text reasoning (250K input, 32K output) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m1-r2large extraction (500K input, 64K output) | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=large extraction (500K input, 64K output); task type; input tokens; output tokens; vision required; DeepSeek fit; Sol fit; workload gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — large extraction (500K input, 64K output) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m1-r3extreme generation (100K input, 200K output) | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=extreme generation (100K input, 200K output); task type; input tokens; output tokens; vision required; DeepSeek fit; Sol fit; workload gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — extreme generation (100K input, 200K output) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m1-r4vision analysis (100K input, 16K output) | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=vision analysis (100K input, 16K output); task type; input tokens; output tokens; vision required; DeepSeek fit; Sol fit; workload gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — vision analysis (100K input, 16K output) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m1-r51M maximum context analysis | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=1M maximum context analysis; task type; input tokens; output tokens; vision required; DeepSeek fit; Sol fit; workload gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 1M maximum context analysis is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m1-r6unsupported context request | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=unsupported context request; task type; input tokens; output tokens; vision required; DeepSeek fit; Sol fit; workload gate decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unsupported context request has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: OpenAI model documentation; verification date 2026-09-07. Missing or conflicting joins fail closed.
Accepted-result and defect-loss crossover model
Frozen Batch 60 scenario board. Formula / deterministic rule: sol_economic = defect_loss_saved > token_cost_difference; defect loss is user-defined input Boundary: Owns accuracy-versus-cost trade-off modeling without inventing probabilities.
| Frozen scenario / field ID | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m2-r1zero defect cost (raw cost comparison) | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=zero defect cost (raw cost comparison); scenario; DeepSeek monthly bill; Sol monthly bill; cost difference; break-even accuracy uplift; economic verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — zero defect cost (raw cost comparison) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m2-r2low defect penalty ($5 per defect) | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=low defect penalty ($5 per defect); scenario; DeepSeek monthly bill; Sol monthly bill; cost difference; break-even accuracy uplift; economic verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — low defect penalty ($5 per defect) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m2-r3medium defect penalty ($25 per defect) | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=medium defect penalty ($25 per defect); scenario; DeepSeek monthly bill; Sol monthly bill; cost difference; break-even accuracy uplift; economic verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — medium defect penalty ($25 per defect) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m2-r4critical production bug ($100 penalty) | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=critical production bug ($100 penalty); scenario; DeepSeek monthly bill; Sol monthly bill; cost difference; break-even accuracy uplift; economic verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — critical production bug ($100 penalty) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m2-r510% DeepSeek retry scenario | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=10% DeepSeek retry scenario; scenario; DeepSeek monthly bill; Sol monthly bill; cost difference; break-even accuracy uplift; economic verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 10% DeepSeek retry scenario is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m2-r6unresolved defect valuation | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=unresolved defect valuation; scenario; DeepSeek monthly bill; Sol monthly bill; cost difference; break-even accuracy uplift; economic verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unresolved defect valuation has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: OpenAI API pricing; verification date 2026-09-07. Missing or conflicting joins fail closed.
Matched canary design and rollout matrix
Frozen Batch 60 scenario board. Formula / deterministic rule: canary_stage = traffic_pct <= max_risk_budget && error_rate <= rollback_threshold Boundary: Owns phased canary migration between DeepSeek and Sol.
| Frozen scenario / field ID | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m3-r11% exploratory validation | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=1% exploratory validation; traffic share; sample size; dual-call spend; error threshold; promotion gate; canary status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 1% exploratory validation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m3-r25% early production canary | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=5% early production canary; traffic share; sample size; dual-call spend; error threshold; promotion gate; canary status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 5% early production canary is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m3-r310% dual-routed validation | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=10% dual-routed validation; traffic share; sample size; dual-call spend; error threshold; promotion gate; canary status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 10% dual-routed validation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m3-r425% pre-cutover verification | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=25% pre-cutover verification; traffic share; sample size; dual-call spend; error threshold; promotion gate; canary status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 25% pre-cutover verification is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m3-r5100% full production traffic | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=100% full production traffic; traffic share; sample size; dual-call spend; error threshold; promotion gate; canary status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 100% full production traffic is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch60-deepseek-v4-pro-vs-gpt-5-6-sol-m3-r6rollback triggered | pair=deepseek-v4-pro vs gpt-5.6-sol; provider=DeepSeek / OpenAI; hostA=api.deepseek.com; hostB=api.openai.com; surfaceA=DeepSeek API; surfaceB=Responses API; requested/effective IDs=deepseek-v4-pro,gpt-5.6-sol; scenario=rollback triggered; traffic share; sample size; dual-call spend; error threshold; promotion gate; canary status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — rollback triggered is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
First-party provenance: OpenAI rate limits; 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 deepseek-v4-pro-vs-gpt-5-6-sol Batch 60 scenario →
How do DeepSeek V4 Pro and GPT-5.6 Sol compare on specs?
| DeepSeek V4 Pro | GPT-5.6 Sol | |
|---|---|---|
| Price (input) | $1.32/M ✓ | $4.00/M |
| Price (output) | $3.96/M ✓ | $20.00/M |
| Blended price | $1.98/M ✓ | $8.00/M |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 384,000 tokens ✓ | 128,000 tokens |
| Modalities | text | text, vision |
| Reasoning mode | Yes | Yes |
| Released | 2026-05 | 2026-06 |
| Speed | 68 t/s ✓ | 44 t/s |
How much do DeepSeek V4 Pro and GPT-5.6 Sol cost at scale?
| Tokens / month | DeepSeek V4 Pro | GPT-5.6 Sol | Delta |
|---|---|---|---|
| 1,000,000 | $1.98 | $8.00 | $6.02 (4.0×) |
| 10,000,000 | $19.80 | $80.00 | $60.20 (4.0×) |
| 100,000,000 | $198.00 | $800.00 | $602.00 (4.0×) |
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.
Choose GPT-5.6 Sol if…
- ✓Strongest OpenAI model for agentic, long-horizon coding
- ✓Deep reasoning mode for multi-step planning
- ✓Native vision input and 1M context
- ✓Complex, multi-step professional and coding work where accuracy matters more than cost.
Run this exact matchup right now
Send the same prompt to DeepSeek V4 Pro and GPT-5.6 Sol side by side and see the outputs yourself.
Try DeepSeek V4 Pro vs GPT-5.6 Sol FreeWhat are common questions about DeepSeek V4 Pro and GPT-5.6 Sol?
Is DeepSeek V4 Pro cheaper than GPT-5.6 Sol?
DeepSeek V4 Pro is cheaper, at $1.98 per million blended tokens vs $8.00 for GPT-5.6 Sol.
Which has the bigger context window, DeepSeek V4 Pro or GPT-5.6 Sol?
Both models support 1,000,000 tokens of context.
Can DeepSeek V4 Pro replace GPT-5.6 Sol for coding?
Both are viable for coding. Thinking mode with visible chain-of-thought (DeepSeek V4 Pro) vs Strongest OpenAI model for agentic, long-horizon coding (GPT-5.6 Sol) — pick based on which strength matters more for your workload.
Which is faster, DeepSeek V4 Pro or GPT-5.6 Sol?
DeepSeek V4 Pro is faster: 68 t/s vs 44 t/s, measured on our speed benchmarks.
Neither of these? See DeepSeek V4 Pro alternatives or GPT-5.6 Sol alternatives.
What related comparisons help choose between DeepSeek V4 Pro and GPT-5.6 Sol?
DeepSeek V4 Pro pricingGPT-5.6 Sol pricingvs Claude Opus 4.8vs Claude Sonnet 5vs Gemini 3.1 Provs Gemini 3.7 FlashPremium model tests
Pricing verified 2026-08-14. Specs verified 2026-08-14.