GPT-6 Sol
GPT-6 Sol is OpenAI's mid-tier model for complex coding and agentic workflows, balancing intelligence and cost with 1.05M context and adjustable reasoning.
Model Overview
Capabilities, design details, and architectural traits
GPT-6 Sol - OpenAI's balance point between flagship intelligence and cost
GPT-6 Sol sits in the middle of OpenAI's GPT-6 lineup. The company positions it as the choice to balance intelligence and cost, between GPT-6 Astra, the flagship for the hardest end-to-end work, and GPT-6 Luna, the efficient model for cost-sensitive, high-volume workloads. Its stated purpose is to power complex coding and agentic workflows.
What sets GPT-6 Sol apart
| Trait | Detail |
|---|---|
| Lineup position | Mid-tier GPT-6 model, chosen to balance intelligence and cost between Astra and Luna |
| Stated purpose | Built to power complex coding and agentic workflows |
| Reasoning effort | Adjustable from none up to max, including a no-reasoning mode that Astra does not offer |
| Context and output | 1.05M token context window with 128K max output tokens |
| Built-in tools | Functions, Web search, File search, and Computer use |
| Input and output | Text and image input with text output, plus multilingual support and vision |
How it fits the GPT-6 family
OpenAI's model catalog frames the choice simply: start with Astra for complex reasoning and coding, pick Sol to balance intelligence and cost, or use Luna for high-volume tasks. Sol shares the same tool set and context window as its siblings, so the trade-off is concentrated in capability and price rather than features.
Access
GPT-6 Sol is available through the Responses API and OpenAI's client SDKs, under the model ID gpt-6-sol.
Benchmark Performance
Independent evaluations · Artificial Analysis
Accuracy & Capability Details
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Evaluate specifications, pricing, and independent benchmark indices
| Model Details | |||
|---|---|---|---|
| General Info | |||
| Provider | OpenAI | Anthropic | Anthropic |
| Release Date | September 22, 2026 | September 22, 2026 | September 28, 2026 |
| Knowledge Cutoff | Apr 2026 | - | Jun 2026 |
| Context & Limits | |||
| Context Window | 1.1M Best Context Window | 1M | 1M |
| Pricing (per 1M tokens) | |||
| Input Pricing | $2 Best Input Pricing | $4 | $2 Best Input Pricing |
| Output Pricing | $10 Best Output Pricing | $20 | $10 Best Output Pricing |
| Modalities | |||
| Inputs | textimagefile | textimagefile | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | 47.6 | 57.6 Best Intelligence Index | 56.0 |
| Coding Index | - | - | - |
| Agentic Index | - | - | - |
Humanity's Last Exam
Extremely difficult logical reasoning and knowledge.
Long Context Reasoning
Logical reasoning over long context windows.
SciCode Benchmark
Scientific coding and mathematical modeling.
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.
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