GPT-5.6 Sol
GPT-5.6 Sol is the flagship of OpenAI's GPT-5.6 series, its most capable model for long-horizon agentic work across coding, biology, and cybersecurity.
text + image + file → text · made by OpenAI
$4→$20per Mtok in / out
OpenAI · 13 sellers
Available within a subscription 2 plans
Bought by the month. What a plan allows is the half of its price that a rate card cannot carry, so it is printed beside every one.
- ChatGPT PlusOpenAIadvanced reasoning with GPT-5.6, expanded messages and uploads, expanded deep research, memory and context, projects, scheduled tasks and custom GPTs, and expanded Codex$20a month
- ChatGPT ProOpenAIfive or twenty times the usage of Plus, Pro reasoning, the maximum Codex tasks, unlimited and faster image creation, and maximum deep research$200a month
Sold by 32 ways
| Seller | Lane | Rate |
|---|---|---|
| OpenAI api | batch | $2per Mtok in$10per Mtok out$0.2per Mtok cacheddevelopers.openai.com · read 2026-08-24 |
| DigitalOcean cloud | standard | $4per Mtok in$20per Mtok out$0.4per Mtok cachedmodels.dev · read 2026-09-16 |
| Microsoft Azure AI cloud | standard | $4per Mtok in$20per Mtok out$0.5per Mtok cached$6.25per Mtok cache writemodels.dev · read 2026-09-16 |
| OpenAI api | standard | $4per Mtok in$20per Mtok out$0.4per Mtok cacheddevelopers.openai.com · read 2026-08-24 |
| AWS Bedrock cloud | standard | $4.4per Mtok in$22per Mtok out$0.44per Mtok cached$5.5per Mtok cache writemodels.dev · read 2026-09-16 |
| Databricks cloud | standard | $5per Mtok in$30per Mtok out$0.5per Mtok cached$5per Mtok cache writemodels.dev · read 2026-09-16 |
| Microsoft Azure AI cloud | long-context | $8per Mtok in$30per Mtok out$0.8per Mtok cachedprices.azure.com · read 2026-09-11 |
| Microsoft Azure AI cloud | priority | $11per Mtok in$66per Mtok out$1.1per Mtok cachedraw.githubusercontent.com · read 2026-09-16 |
| Nous Research 2 ways | $2per Mtok in$10per Mtok out$0.2per Mtok cached$2.5per Mtok cache write | |
| Nous Research aggregator | batch | $1per Mtok in$5per Mtok out$0.1per Mtok cached$1.25per Mtok cache writeinference-api.nousresearch.com · read 2026-09-12 |
| Nous Research aggregator | standard | $2per Mtok in$10per Mtok out$0.2per Mtok cached$2.5per Mtok cache writeinference-api.nousresearch.com · read 2026-09-12 |
| OpenRouter 8 ways | $2per Mtok in$10per Mtok out$0.2per Mtok cached$2.5per Mtok cache write | |
| OpenRouter aggregator | batch | $1per Mtok in$5per Mtok out$0.1per Mtok cached$1.25per Mtok cache writeopenrouter.ai · read 2026-08-24 |
| OpenRouter aggregator | openai/flex | $1per Mtok in$5per Mtok out$0.1per Mtok cached$1.25per Mtok cache writeopenrouter.ai · read 2026-08-25 |
| OpenRouter aggregator | standard | $2per Mtok in$10per Mtok out$0.2per Mtok cached$2.5per Mtok cache writeopenrouter.ai · read 2026-08-24 |
| OpenRouter aggregator | openai/fast | $4per Mtok in$20per Mtok out$0.4per Mtok cached$5per Mtok cache writeopenrouter.ai · read 2026-08-31 |
| OpenRouter aggregatornot on the seller's list today | openai/priority | $4per Mtok in$20per Mtok out$0.4per Mtok cached$5per Mtok cache writeopenrouter.ai · read 2026-08-25 |
| OpenRouter aggregator | amazon-bedrock/us-east-1 | $4.4per Mtok in$22per Mtok out$0.44per Mtok cached$5.5per Mtok cache writeopenrouter.ai · read 2026-08-29 |
| OpenRouter aggregator | azure | $5per Mtok in$30per Mtok out$0.5per Mtok cached$6.25per Mtok cache writeopenrouter.ai · read 2026-08-25 |
| OpenRouter aggregator | azure/eu | $5.5per Mtok in$33per Mtok out$0.55per Mtok cached$6.88per Mtok cache writeopenrouter.ai · read 2026-08-25 |
| OpenRouter aggregator | azure/us | $5.5per Mtok in$33per Mtok out$0.55per Mtok cached$6.88per Mtok cache writeopenrouter.ai · read 2026-08-25 |
| Vercel AI Gateway aggregator | standard | $2per Mtok in$10per Mtok out$0.2per Mtok cached$2.5per Mtok cache writeai-gateway.vercel.sh · read 2026-08-25 |
| Requesty 4 ways | $2.25per Mtok in$13.5per Mtok out$0.23per Mtok cached | |
| Requesty aggregatornot on the seller's list today | openai flex | $2.25per Mtok in$13.5per Mtok out$0.23per Mtok cachedrouter.requesty.ai · read 2026-08-25 |
| Requesty aggregatornot on the seller's list today | openai-responses flex | $2.25per Mtok in$13.5per Mtok out$0.23per Mtok cachedrouter.requesty.ai · read 2026-08-25 |
| Requesty aggregator | openai | $2.5per Mtok in$15per Mtok out$0.25per Mtok cachedrouter.requesty.ai · read 2026-09-16 |
| Requesty aggregatornot on the seller's list today | bedrock us-east-2 | $3.96per Mtok in$19.8per Mtok out$0.4per Mtok cachedrouter.requesty.ai · read 2026-08-25 |
| Requesty aggregator | azure | $4.4per Mtok in$22per Mtok out$0.44per Mtok cachedrouter.requesty.ai · read 2026-09-16 |
| Requesty aggregator | bedrock | $4.4per Mtok in$22per Mtok out$0.44per Mtok cachedrouter.requesty.ai · read 2026-08-28 |
| Requesty aggregatornot on the seller's list today | azure swedencentral | $4.95per Mtok in$29.7per Mtok out$0.49per Mtok cachedrouter.requesty.ai · read 2026-08-25 |
| Requesty aggregator | openai-responses | $5per Mtok in$30per Mtok out$0.5per Mtok cachedrouter.requesty.ai · read 2026-09-11 |
| Venice AI aggregator | standard | $2.5per Mtok in$12.5per Mtok out$0.25per Mtok cached$3.12per Mtok cache writemodels.dev · read 2026-09-16 |
| ElectronHub aggregator | standard | $4per Mtok in$24per Mtok outapi.electronhub.ai · read 2026-09-16 |
| GitHub Copilot aggregator | standard | $4per Mtok in$20per Mtok out$0.4per Mtok cached$5per Mtok cache writemodels.dev · read 2026-09-16 |
| Inference.net aggregator | standard | $5per Mtok in$30per Mtok out$0.5per Mtok cachedapi.inference.net · read 2026-09-16 |
Measured 51 standings
| Place | Board | Metric | Score |
|---|---|---|---|
| 1stof 205 | ARC-AGI-1 (Public Eval) | Score (%) (max) | 99 |
| 1stof 112 | Ale bench — Epoch AI | Performance (max) | 2176.88 |
| 1stof 177 | Critpt — Epoch AI | Accuracy (max) | 32.3 |
| 1stof 39 | Gdp pdf — Epoch AI | GDP.pdf score | 0.307 |
| 1stof 34 | LMArena · Search | Score (Elo) (xhigh) | 1257 |
| 2ndof 46 | Enigma eval — Epoch AI | Accuracy (high) | 37.12 |
| 2ndof 9 | Frontierswe — Epoch AI | Score (max) | 32.202 |
| 2ndof 12 | Posttrainbench — Epoch AI | Average (%) (max) | 0.362 |
| 3rdof 227 | Arc agi 2 — Epoch AI | Score (max) | 92.5 |
| 3rdof 106 | Frontiermath tiers 1 3 v2 — Epoch AI | mean_score (max) | 89.123 |
| 3rdof 26 | Surface evolver bench — Epoch AI | Mean score (xhigh) | 0.931 |
| 3rdof 60 | Vending bench 2 — Epoch AI | Score | 9619.368 |
| 3rdof 60 | Vending-Bench 2 — Current leaderboard | Money Balance (average across 5 runs) | 9619.37 |
| 4thof 232 | ARC-AGI-2 (Semi-Private) | Score (%) (max) | 92.5 |
| 4thof 21 | Ebr bench — Epoch AI | mean_score (max) | 44.762 |
| 4thof 123 | Lmca — Epoch AI | Score (max) | 58.43 |
| 4thof 127 | Mystery game puzzles — Epoch AI | mean_score (max) | 58 |
| 4thof 16 | Osworld 2 — Epoch AI | Binary accuracy (max) | 0.273 |
| 4thof 28 | τ³-Banking Leaderboard | Pass^1 | 46.9 |
| 5thof 184 | Artificial Analysis · Coding Index | Index | 77.4 |
| 5thof 24 | Blueprint bench 2 — Epoch AI | Score | 33.623 |
| 5thof 10 | Btf3 — Epoch AI | Pooled score (max) | 0.137 |
| 5thof 8 | Mirrorcode — Epoch AI | mean_score (high) | 20 |
| 5thof 290 | OTIS Mock AIME 2024-2025 | mean_score (max) | 100 |
| 5thof 17 | SWE-rebench Leaderboard (default window 15/05/2026–01/07/2026, 111 problems) | Resolved Rate (%) (medium) | 62.3 |
| 6thof 244 | Arc agi — Epoch AI | Score (xhigh) | 97.5 |
| 6thof 222 | Chess puzzles — Epoch AI | mean_score (max) | 55 |
| 6thof 30 | Frontiercode — Epoch AI | Main score | 0.475 |
| 6thof 64 | Proofbench — Epoch AI | Accuracy (max) | 83 |
| 6thof 80 | Simpleqa verified — Epoch AI | mean_score (max) | 69.7 |
| 7thof 23 | Gbaeval — Epoch AI | Overall score | 0.526 |
| 8thof 230 | ARC-AGI-1 (Semi-Private) | Score (%) (xhigh) | 97.5 |
| 8thof 170 | Weirdml — Epoch AI | Accuracy (high) | 88.76 |
| 9thof 69 | Deepswe — Epoch AI | Pass@1 (max) | 0.727 |
| 9thof 161 | Dtbench — Epoch AI | Accuracy (max) | 95.47 |
| 9thof 62 | Frontiermath tier 4 v2 — Epoch AI | mean_score (max) | 82.927 |
| 9thof 121 | Webdev arena — Epoch AI | Arena Score (xhigh) | 1618.71 |
| 10thof 65 | Apex agents — Epoch AI | Pass@1 score (max) | 0.399 |
| 10thof 168 | Scicode — Epoch AI | Score (high) | 56.944 |
| 12thof 74 | Cursorbench — Epoch AI | Score (max) | 67.2 |
| 12thof 313 | GPQA Diamond | mean_score (max) | 93.497 |
| 13thof 216 | ARC-AGI-2 (Public Eval) | Score (%) (max) | 93.75 |
| 13thof 46 | LMArena · Agent | Net Improvement (%) | 7.1 |
| 14thof 39 | ARC-AGI-3 (Semi-Private) | Score (%) (max) | 7.78 |
| 14thof 302 | Artificial Analysis · Intelligence Index | Artificial Analysis Intelligence Index (max) | 47 |
| 14thof 152 | LMArena · Vision | Score (Elo) (xhigh) | 1286 |
| 14thof 128 | LMArena · WebDev | Score (Elo) (xhigh) | 1617 |
| 17thof 143 | Artificial Analysis · Agentic Index | Index | 50.5 |
| 18thof 402 | LMArena · Text | Score (Elo) (xhigh) | 1483 |
| 18thof 102 | Simplebench — Epoch AI | Score (AVG@5) | 0.648 |
| 27thof 656 | Epoch capabilities index — Epoch AI | ECI Score (max) | 162.03 |
About
GPT-5.6 Sol — a text model from OpenAI, sold by 13 companies from $2 in and $10 out per million tokens, placed 1st of 205 on ARC-AGI-1 (Public Eval).
It takes text, images and files and returns text, with a context window of 1,050,000 tokens. It was published in July 2026, trained on material up to February 2026. Its sellers say it can reason step by step and call a tool. The catalogue files it under reasoning, code and agents. Thirteen companies sell it. The cheapest is $2 in and $10 out per million tokens at Nous Research. Beside the standard rate there are separately routed, faster, batch, regional and flex lanes. It has been measured on 51 boards, and stands best at 1st of 205 on ARC-AGI-1 (Public Eval).
Every current figure
- Maker
- OpenAI
- Register
- model
- Takes
- text + image + file
- Returns
- text
- Context
- 1,050,000 tokens
- Published
- July 2026
- Knowledge to
- February 2026
- Licence
- not read
- Sellers
- 13
- Price
- $2 in and $10 out per million tokens — Nous Research
- Boards
- 51
- Best place
- 1st of 205 — ARC-AGI-1 (Public Eval)
Known as 25 names
GPT-5.6 Sol (high)GPT-5.6 Sol (low)GPT-5.6 Sol (max)GPT-5.6 Sol (medium)GPT-5.6 Sol (xhigh)gpt-5.6-sol_maxGPT 5.6 Sol (xHigh)gpt-5.6-sol-xhighgpt-5.6-sol-xhigh (codex-harness)GPT-5.6 Sol [medium]OpenAI GPT-5.6 Sol [medium]GPT-5.6-sol5.6 solopenai/gpt-5.6-solopenai/gpt-5.6-sol:batchazure/gpt-5.6-sol@eastus2azure/gpt-5.6-sol@swedencentralazure/openai-responses/gpt-5.6-sol@eastus2azure/openai-responses/gpt-5.6-sol@swedencentralbedrock/gpt-5.6-sol@us-east-1bedrock/gpt-5.6-sol@us-east-2openai-responses/gpt-5.6-solopenai-responses/gpt-5.6-sol:flexopenai/gpt-5.6-sol:flexOpenAI: GPT-5.6 Sol (batch)