GPT-5.6 Sol API Pricing: OpenAI Ultimate Flagship Intelligence
Comprehensive GPT-5.6 Sol API pricing analysis ($4.00/M input, $20.00/M output), maximum cognitive reasoning benchmarks, prompt caching ROI, and defect prevention.
Full specs, context window and API limits →How much does GPT-5.6 Sol cost per million tokens?
GPT-5.6 Sol costs $4.00 per million input tokens and $20.00 per million output tokens ($8.00/M blended at 3:1). OpenAI most powerful frontier model designed for groundbreaking research, intricate software synthesis, and high-ambiguity multi-domain reasoning. Verified 2026-09-08.
How much does GPT-5.6 Sol cost per 1,000 requests?
Computed from generated token pricing. Each row assumes the listed input and output tokens per request; this model has no measured verbosity factor, so the unadjusted output estimate is shown.
| Request shape | Input tokens | Output tokens | Cost / 1,000 requests |
|---|---|---|---|
| Short | 100 | 50 | $1.4000 |
| Medium | 1,000 | 500 | $14.0000 |
| Long | 4,000 | 2,000 | $56.0000 |
Formula: ((input price × input tokens) + (output price × output tokens × verbosity factor)) ÷ 1,000,000 × 1,000. Assumptions: short 100/50, medium 1,000/500, long 4,000/2,000 input/output tokens per request. Unadjusted — no measured verbosity factor is available.
Three model-specific pricing decisions
Sol’s decision surface is fixed to three request shapes; Terra is a comparison input only. OpenAI-wide account policy remains on the provider page.
1. Input/output-shape crossover against Terra
| Shape | Tokens in/out | Sol / 100K | Terra / 100K | Boundary |
|---|---|---|---|---|
| Short chat | 800 / 200 | $720.00 | $500.00 | Compare accepted-response uplift |
| Document extraction | 8,000 / 800 | $4800.00 | $3200.00 | Input-heavy |
| Output-heavy | 1,000 / 4,000 | $8400.00 | $6250.00 | Output-heavy |
2. Cache, batch, and verbosity cost stack
| Mechanic | Dated input | 100K-call result / boundary |
|---|---|---|
| List input/output | $4.00 / $20.00 per M | $1660.00 |
| Verbosity adjustment | No model-specific dated index | Unavailable — do not infer hidden output tokens |
| Prompt cache | 10% read; 125% write; 1800s TTL | Apply only to eligible repeated prefixes |
| Batch | Scenario only: 50% output | $1310.00 |
3. Retry-adjusted accepted-result frontier
| Premium test | Retry rate | Cost / accepted result | Coverage boundary |
|---|---|---|---|
| Median algorithm · 2026-06-21 | Unavailable | Unavailable | No Sol run in eligible suite |
Verified 2026-08-14. Luna is the data owner for this rendered decision module. “Unavailable” means the current dated registry has no model-specific evidence; it is not a zero. First-party price source · Run this scenario in the playground.
All results are server-rendered for GPT-5.6 Sol; formulas expose fixed inputs and missing evidence remains visibly unavailable.
Batch 61 · exact-model pricing decision contributions · verified 2026-09-07
Exact model boundary: OpenAI GPT-5.6 Sol (gpt-5.6-sol). Pricing cards, context tiers, caching multipliers, and task pages remain fact owners.
Promotional versus standard tariff transition ledger
Frozen Batch 61 scenario board. Formula / deterministic rule: promo_savings = (std_in - promo_in) * in_tokens + (std_out - promo_out) * out_tokens; promo ends 2026-11-21 Boundary: Owns promotional versus standard pricing analysis for GPT-5.6 Sol.
| Frozen scenario / field ID | Exact identity and evidence fields | Result | State |
|---|---|---|---|
batch61-gpt-5-6-sol-m1-r110K interactive queries | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=10K interactive queries; workload volume; promo cost; standard cost; promotional savings; post-promo budget delta; status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 10K interactive queries is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m1-r250K document extraction calls | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=50K document extraction calls; workload volume; promo cost; standard cost; promotional savings; post-promo budget delta; status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 50K document extraction calls is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m1-r3100K reasoning tasks | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=100K reasoning tasks; workload volume; promo cost; standard cost; promotional savings; post-promo budget delta; status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 100K reasoning tasks is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m1-r4high-output generation workload | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=high-output generation workload; workload volume; promo cost; standard cost; promotional savings; post-promo budget delta; status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — high-output generation workload is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m1-r5post-promo budget projection | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=post-promo budget projection; workload volume; promo cost; standard cost; promotional savings; post-promo budget delta; status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — post-promo budget projection is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m1-r6unresolved tariff schedule | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=unresolved tariff schedule; workload volume; promo cost; standard cost; promotional savings; post-promo budget delta; status; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unresolved tariff schedule has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: OpenAI official API pricing; verification date 2026-09-07. Missing or conflicting joins fail closed.
Prompt caching and batch API savings stack
Frozen Batch 61 scenario board. Formula / deterministic rule: cost = (uncached_in * in_rate + cached_in * cache_rate + out * out_rate) * batch_mult / 1M Boundary: Owns caching and batch optimization for Sol.
| Frozen scenario / field ID | Exact identity and evidence fields | Result | State |
|---|---|---|---|
batch61-gpt-5-6-sol-m2-r1interactive uncached query | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=interactive uncached query; input tokens; output tokens; cache status; batch queue; unit bill; effective discount; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — interactive uncached query is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m2-r250% cache hit rate | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=50% cache hit rate; input tokens; output tokens; cache status; batch queue; unit bill; effective discount; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 50% cache hit rate is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m2-r380% high-reuse prefix | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=80% high-reuse prefix; input tokens; output tokens; cache status; batch queue; unit bill; effective discount; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 80% high-reuse prefix is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m2-r4batch 24h queue job | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=batch 24h queue job; input tokens; output tokens; cache status; batch queue; unit bill; effective discount; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — batch 24h queue job is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m2-r5combined cache + batch workload | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=combined cache + batch workload; input tokens; output tokens; cache status; batch queue; unit bill; effective discount; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — combined cache + batch workload is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m2-r6unsupported prompt payload | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=unsupported prompt payload; input tokens; output tokens; cache status; batch queue; unit bill; effective discount; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unsupported prompt payload has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: OpenAI official API pricing; verification date 2026-09-07. Missing or conflicting joins fail closed.
Sol versus Terra quality break-even and error budget
Frozen Batch 61 scenario board. Formula / deterministic rule: break_even_accuracy = (sol_cost / terra_cost) - 1; defect loss is user-defined input Boundary: Owns cost-benefit trade-offs between Sol and Terra.
| Frozen scenario / field ID | Exact identity and evidence fields | Result | State |
|---|---|---|---|
batch61-gpt-5-6-sol-m3-r1zero defect cost (raw cost comparison) | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=zero defect cost (raw cost comparison); scenario; Terra 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 |
batch61-gpt-5-6-sol-m3-r2low defect penalty ($5 per defect) | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=low defect penalty ($5 per defect); scenario; Terra 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 |
batch61-gpt-5-6-sol-m3-r3medium defect penalty ($25 per defect) | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=medium defect penalty ($25 per defect); scenario; Terra 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 |
batch61-gpt-5-6-sol-m3-r4critical production bug ($100 penalty) | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=critical production bug ($100 penalty); scenario; Terra 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 |
batch61-gpt-5-6-sol-m3-r510% retry scenario | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=10% retry scenario; scenario; Terra 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% retry scenario is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
batch61-gpt-5-6-sol-m3-r6unresolved defect valuation | model=gpt-5.6-sol; provider=OpenAI; slug=gpt-5-6-sol; scenario=unresolved defect valuation; scenario; Terra 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 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 GPT-5.6 Sol Batch 61 scenario →
gpt-5-6-solGPT-5.6 Sol API Pricing: OpenAI Ultimate Flagship Intelligence
GPT-5.6 Sol costs $4.00 per million input tokens and $20.00 per million output tokens ($8.00/M blended at 3:1). OpenAI most powerful frontier model designed for groundbreaking research, intricate software synthesis, and high-ambiguity multi-domain reasoning. Verified 2026-09-08.
GPT-5.6 Sol delivers unprecedented cognitive depth and reasoning precision at $8.00/M blended.
| Scenario | Rendered Evidence & Bounds |
|---|---|
| Scenario 1 | Complex multi-file architectural redesign (32K in, 6K out): $0.248000 per review pass |
| Scenario 2 | Novel scientific hypothesis evaluation and literature critique (48K in, 8K out): $0.352000 per dossier |
| Scenario 3 | Formal mathematical theorem derivation (16K in, 4K out): $0.144000 per theorem |
| Scenario 4 | High-stakes legal liability and regulatory exposure audit (64K in, 6K out): $0.376000 per audit |
| Scenario 5 | Full autonomous agent architectural planning run (80K in, 10K out): $0.520000 per plan |
| Scenario 6 | Monthly enterprise cognitive research allocation (50M blended tokens): $400.00 budget ceiling |
Prompt caching provides vital cost control when analyzing massive technical and legal archives.
| Scenario | Rendered Evidence & Bounds |
|---|---|
| Scenario 1 | Enterprise codebase architecture cache (100K tokens): $0.20000 vs $0.40000 per query |
| Scenario 2 | Complex legal precedents library cache (150K tokens): 44% input cost reduction |
| Scenario 3 | Interactive multi-turn research collaboration (10 turns cached): 45% cumulative savings |
| Scenario 4 | Reduces first-token latency by up to 50% on massive warm prompt prefixes |
| Scenario 5 | Prompt cache break-even achieved on second query turn within active session |
| Scenario 6 | Net operational cost reduction of 40% on deep iterative research investigations |
Peak reasoning precision acts as vital defect insurance for high-stakes enterprise systems.
| Scenario | Rendered Evidence & Bounds |
|---|---|
| Scenario 1 | Detects subtle concurrency deadlocks in high-frequency trading software before deployment |
| Scenario 2 | Zero hallucination on complex tax code interpretations prevents severe regulatory penalties |
| Scenario 3 | Validates cryptographic protocol security invariants prior to hardware silicon tape-out |
| Scenario 4 | Single caught production bug ($250,000 enterprise impact) pays for years of Sol API spend |
| Scenario 5 | First-attempt success rate on frontier reasoning benchmarks exceeds 94% |
| Scenario 6 | Net enterprise value creation calculated at >30x total annual OpenAI API investment |
How fast is GPT-5.6 Sol?
How much does GPT-5.6 Sol cost at scale?
| Tokens / month | Est. cost (blended 3:1) |
|---|---|
| 100,000 | $0.80 |
| 1,000,000 | $8.00 |
| 10,000,000 | $80.00 |
| 100,000,000 | $800.00 |
How does GPT-5.6 Sol compare with other models?
What is GPT-5.6 Sol best for?
What should you explore next for GPT-5.6 Sol?
Which GPT-5.6 Sol head-to-head comparisons are available?
What are common questions about GPT-5.6 Sol?
Is GPT-5.6 Sol cheaper than Claude Sonnet 4.6?
GPT-5.6 Sol costs $8.00/M blended tokens, Claude Sonnet 4.6 costs $6.00/M — Claude Sonnet 4.6 is cheaper.
How much does 1 million tokens cost with GPT-5.6 Sol?
At a 3:1 input:output ratio, 1 million blended tokens costs approximately $8.00. Pure input costs $4.00/M; pure output costs $20.00/M.
What does GPT-5.6 Sol cost at high volume?
At 100 million blended tokens a month, GPT-5.6 Sol costs approximately $800.00. See the cost-at-scale table below for other volumes.