OpenAI: GPT-5.6 Sol
Analysis Summary
GPT-5.6 Sol is OpenAI's strongest benchmarked model in the GPT-5.6 family, with an intelligence index of 49.4 that places it just outside the top tier but well ahead of most production models. Its coding index of 69.7 and agentic index of 68.3 confirm it as a capable choice for software engineering, autonomous agents, and complex multi-step workflows.
The 1.05M token context window, combined with vision, tool use, function calling, and file input support, makes it one of the most capable all-round models available. It suits long-document analysis, codebase-level reasoning, customer-facing automation, and multimodal pipelines. The terminalbench and tau2 scores further confirm reliable agentic execution.
At $5.00 input and $30.00 output per million tokens, it is expensive. Teams should reserve it for high-value tasks where reasoning depth and context capacity justify the cost, pairing it with cheaper models for routine calls.
Assessed July 10, 2026
Editorial notes
GPT-5.6 Sol from OpenAI combines near-frontier reasoning with a strong coding index, high agentic performance, vision, tool use, and a 1M token context window for demanding business workloads.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How OpenAI: GPT-5.6 Sol compares
OpenAI: GPT-5.6 Sol ranks #5 of 391 AI models we track for overall intelligence, #2 of 160 for coding, #11 of 296 for agentic tasks. Its 1.1M-token context window is larger than 98% of the models we list. At $5.00 per million input tokens it is cheaper than 7% of comparable models.
About OpenAI: GPT-5.6 Sol
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks..
Capabilities
Performance Indices
Source: Artificial Analysis
This model was released recently. Independent benchmark evaluations are typically completed within days of release, so these figures are preliminary and are likely to be updated as testing is finalised.
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does OpenAI: GPT-5.6 Sol stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
openai/gpt-5.6-sol
|
| Provider | openai |
| Release Date | July 9, 2026 |
| Context Length | 1,050,000 tokens |
| Max Completion | 128,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $5.00 | $0.005000 |
| Output | $30.00 | $0.030000 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about OpenAI: GPT-5.6 Sol
How much does OpenAI: GPT-5.6 Sol cost?
OpenAI: GPT-5.6 Sol costs $5.00 per million input tokens and $30.00 per million output tokens.
What is the context window of OpenAI: GPT-5.6 Sol?
OpenAI: GPT-5.6 Sol has a context window of 1,050,000 tokens (1.1M).
Is OpenAI: GPT-5.6 Sol good for coding?
On our coding benchmark index, OpenAI: GPT-5.6 Sol ranks #2 of 160 models, placing it in the top quartile of the field for code generation and debugging.
What can OpenAI: GPT-5.6 Sol do?
OpenAI: GPT-5.6 Sol supports image/vision input, tool use, and function calling.
Who created OpenAI: GPT-5.6 Sol?
OpenAI: GPT-5.6 Sol is developed by OpenAI and was released on July 9, 2026.
