GPT-5.6 Sol Pro
openai/gpt-5.6-sol-pro- OpenAI
- Family · GPT-5 Sol Pro
- File · Image · Text → Text
- Reasoning · adjustable
- Tools · JSON · Vision
Spec & list price
Context1M
Max output128K
Input / 1M$4.00
Output / 1M$20.005× input
Usage
Tokens / day718.4M▲ 3.4% 7d
Usage rank#213
Requests / day7.3K
Tool calls / req0.33
Per request · 30 days
Avg input77.2K5.2× median
Avg output3.1K4.4× median
Cache hit72%about median
Reasoning share53%about median
Tool-call failures0.4%0.2× median
Consumption
Peak 30.9B 28 SepLow 326.7M 24 OctRank today #213
News & trends
News · latest from OpenAI
- GPT-6.1 Terra vs. Claude Opus 5.5: Cheaper and faster in three tests at maxthenewstack.io · 2 Nov
- Chinese labs now target OpenAI's GPT-6 Astra for distillationfork.zone · 1 Nov
- GPT-6.1 Terrasimonwillison.net · 31 Oct
- GPT-5.6 Sol can beat Factorio on peaceful moderyanmadden.net · 31 Oct
Speed
Output speed#34/334126 tok/s2.0× faster than median
Fastest provider133 tok/sbest of 3 providers
First token#3185.57 s5.2× longer than median
Technical details
- Reasoning
- on · medium
- Tokenizer
- GPT
- Knowledge cutoff
- 2026-02-16
- Moderation
- moderated
Reasoning effort
- max
- xhigh
- high
- medium · default
- low
- none
Request parameters 11
- tools
- tool_choice
- response_format
- structured_outputs
- reasoning
- reasoning_effort
- include_reasoning
- max_tokens
- max_completion_tokens
- seed
+1 more
- verbosity
When to use
Best for
- Hardest reasoning at maximum effort
- Complex multi-file coding tasks
- Deep analysis of very long documents
- Image and file reasoning for experts
Think twice for
- High-volume simple chat (cheaper options exist)
- Latency-critical interactive apps
- Self-hosting (closed weights)
Research papers
- An Explicit Family of Log-Concave Counterexamples to the Gaussian Completely Monotone Conjecture31 Aug
- Tight upper bound on $d_{GH}(S^1,S^{2k+1})$: GPT's short proof21 Aug
- Superlinear separation between linear and centered colorings19 Aug
- A lower bound for stepsize-based acceleration of gradient descent11 Aug
- Row pathwidth of complete binary trees10 Aug
- Schubitopes are not Ehrhart positive1 Aug
- The Half-Lives of Generative-AI Evidence: A 40-Record Audit, a Claim-Currency Framework, and a Reflexive Case of Frontier-Model-Assisted Research27 Jul
- The Price of Hidden Curvature: Improved Lower Bounds for Bandit Convex Optimization21 Jul
Same family
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