GPT-5.6 Sol

Jul 2026
GPT-5.6 Sol
Compare in
on
$0.26per task?
$4 / $20per 1M in / outcache $0.40
79 tok/sfirst token in 2.2 s?
1.05Mcontext

Rankingat low effort?

Full ranking →
1Fable 51001Fable 5.11001Opus 5.51001Sonnet 5.51001Gemini 4 Argon100
···
31Gemini 3.1 Pro Preview95.632GPT-5.6 Sol95.632Gemini 3 Flash Preview95.6

Strong at

S
Knowledge#28 of 320
A
Reasoning#50 of 336Science#35 of 312Long context#69 of 314Vision#13 of 125
B
Coding#55 of 134Agents & work tasks#46 of 177Tool calling#85 of 242Instructions#66 of 245

Alternatives?

ModelScoreCostPer taskWhat changes
CheaperQwen3.8 Max (0902)xhigh+5%-63%$2 / $6Context: 1.05M → 984KBetterGPT-6 Lunamax+3%-74%$0.068Function calling only with none · Chat Completions+3OpenDeepSeek V4.1 Flash 1017max+4%same$0.26Context: 1.05M → 1M+5CheaperClaude Haiku 5.5xhigh+3%-53%$0.12Context: 1.05M → 1M+6CheaperMistral Large 4high+3%-74%$1.36 / $4.18Context: 1.05M → 1M+5

History

3 versions
90100110Oct 26Release dateOTIS Mock AIME 2024 20255.666.1
90100110Oct 26Release dateOTIS Mock AIME 2024 20255.666.1

Benchmarks

in Chat & Knowledge
AA Intelligence Index 4.3.233.5#51
AA Omniscience Index18.9#28
AA Omniscience · Accuracy57.2#8
AA Omniscience · Hallucination Rate89.4#244
Humanity's Last Exam39.4#50
GPQA Diamond89.8#35
AA-LCR (long context) 1.178#69
IFBench (instructions)66.5#66
CritPt (physics)14.9#47
GDP.pdf · AA all-pass21#23
MLCR-AA23.3#14
ARC-AGI-1 · public evaluation84.5#37
ARC-AGI-1 · semi-private74.5#40
ARC-AGI-2 · public evaluation38.5#35
ARC-AGI-2 · semi-private42.5#36
ARC-AGI-3 · semi-private0.3#15
GPQA Diamond · Epoch89.9#34
OTIS Mock AIME 2024 202595.6#32
Chess Puzzles31#42
Mystery Game Puzzles26#28
HLE fulllab44.5
SEC-Bench Prolab74.3
ExploitGymlab33.7
HealthBench Professional length-adjustedlab60.5
HealthBench length-adjustedlab57
HealthBench Hard length-adjustedlab33.1
HealthBench Consensus length-adjustedlab95.5

FAQ

How much does GPT-5.6 Sol cost?›

$4 per 1M input tokens and $20 per 1M output tokens; cached input $0.40 per 1M. A typical benchmark task costs about $0.26 at low effort.

Is GPT-5.6 Sol free to use?›

There is no free API; the cheapest paid price is $4 per 1M input tokens.

How good is GPT-5.6 Sol, and what is it best at?›

#50 of 336 in Chat & Knowledge, #55 of 134 in Coding, #43 of 135 in Agents & Tool Use, #24 of 197 in Writing & Language, #13 of 125 in Vision & Documents. Strongest at: Reasoning, Science, Long context, Knowledge, Vision.

Is GPT-5.6 Sol better than Gemini 4 Argon?›

On OTIS Mock AIME 2024 2025, GPT-5.6 Sol scores 100 vs 100 — about the same. It is 84% cheaper per task.

How can I use GPT-5.6 Sol?›

Through the API of Amazon Bedrock, Azure, OpenAI.

What is the context window of GPT-5.6 Sol?›

1.05M tokens, with up to 128K output tokens.

When was GPT-5.6 Sol released? Is there a newer version?›

Released 2026-07-09. It has been superseded by GPT-6 Sol.

Is GPT-5.6 Sol open source?›

No, GPT-5.6 Sol is a closed model available through an API. The closest open-weights option here is DeepSeek V4.1 Flash 1017.

Can GPT-5.6 Sol read images?›

It accepts text and images, PDF files as input.

What is GPT-5.6 Sol?›

GPT-5.6 Sol is a closed language model from OpenAI, released Jul 2026, the successor to GPT-4.

What are the best alternatives to GPT-5.6 Sol?›

Qwen3.8 Max (0902) (cheaper), GPT-6 Luna (better), DeepSeek V4.1 Flash 1017 (open weights).