By the toolist.ai editors. Researched from public sources, not hands-on tested by toolist.ai. Updated October 6, 2026; prices checked October 6, 2026.
GPT-6 Sol: price, context window and benchmarks
GPT-6 Sol is the original mid-tier GPT-6 model, at $2 per million input tokens and $10 per million output tokens. GPT-6.1 Sol replaced it as OpenAI's recommended Sol one week later at the same prices, but GPT-6 Sol is still on the API and is the faster of the two at max effort.
Best for
- Existing integrations that already run on it and are not ready to retest
- Calls that need no reasoning at all, since it still accepts the "none" effort level
- Output speed at max effort, where Artificial Analysis measures about 100 tokens a second
Key facts
| Fact | GPT-6 Sol | Source |
|---|---|---|
| Provider | OpenAI | OpenAI API docs: Pricing |
| API model name | gpt-6-sol | OpenAI API docs: GPT-6 Sol |
| Released | September 22, 2026 | OpenAI API docs: Changelog |
| Input price | $2 per million tokens | OpenAI API docs: Pricing |
| Cached input price | $0.20 per million tokens | OpenAI API docs: Pricing |
| Output price | $10 per million tokens | OpenAI API docs: Pricing |
| Context window | 1,050,000 tokens | OpenAI API docs: GPT-6 Sol |
| Maximum output | 128,000 tokens | OpenAI API docs: GPT-6 Sol |
| Knowledge cutoff | April 20, 2026 | OpenAI API docs: GPT-6 Sol |
| Input and output | Text and images in; text out | OpenAI API docs: GPT-6 Sol |
| Reasoning | Effort levels none to max; medium is the default | OpenAI API docs: Reasoning models |
| API and cloud platforms | OpenAI API (Responses, Chat Completions and Batch) | OpenAI API docs: GPT-6 Sol |
| In the apps | ChatGPT Plus, Pro, Business, Enterprise and Edu, in ChatGPT Work and Codex | ChatGPT docs: Models |
Prompts over 272,000 input tokens are billed at twice the input rate and 1.5 times the output rate for the whole request. Batch and Flex cost half; Fast mode costs double.
What GPT-6 Sol costs a month
Three typical workloads, priced at the standard API rates above. We calculated these; the provider does not publish them.
| Workload | Tokens a month | Cost a month |
|---|---|---|
| Support chatbot 100,000 replies, each 3,000 input and 400 output tokens, no caching | 300M in, 40M out | $1,000 |
| Document Q&A 5,000 questions over the same 60,000-token document set (90% cache hits), 800 output tokens each | 300M in, 4M out | $154 |
| Coding agent 200 tasks, each 1.5 million input tokens (90% cache hits) and 50,000 output tokens | 300M in, 10M out | $214 |
Reasoning models bill their thinking as output tokens, so heavy reasoning can raise the output count several times. Cache-write charges are not included.
Benchmarks
| Benchmark | Score | Source |
|---|---|---|
| Artificial Analysis Intelligence Index max effort | 47.6 | Artificial Analysis: GPT-6 Sol (max) |
| Intelligence Index at everyday effort medium effort, the API default | 39.8 | Artificial Analysis: GPT-6 Sol (medium) |
| Coding Agent Index Codex harness, max effort | 56.7 | Artificial Analysis: Coding agents |
| Terminal-Bench 4.0 max effort | 43.9% | Artificial Analysis: GPT-6.1 Sol vs GPT-6 Sol |
| Humanity's Last Exam max effort | 47.9% | Artificial Analysis: GPT-6.1 Sol vs GPT-6 Sol |
| GDPval-AA v2.1 (Elo) max effort | 1510 | Artificial Analysis: GPT-6.1 Sol vs GPT-6 Sol |
| SciCode max effort | 57.6% | Artificial Analysis: GPT-6.1 Sol vs GPT-6 Sol |
| Terminal-Bench-Science 0.1 max effort | 30.0% | Artificial Analysis: GPT-6 Sol (max) |
Speed: about 99.8 output tokens a second, 109.8 seconds to the first token (max effort, OpenAI API; no medium-effort figure is published; Artificial Analysis: GPT-6 Sol (max)).
Benchmark and speed data marked as such come from Artificial Analysis.
What changed
OpenAI's model page now points to GPT-6.1 Sol as the newer Sol model. GPT-6 Sol has not been deprecated. (OpenAI API docs: GPT-6 Sol)
GPT-6 Sol compared
Other models
- GPT-6.1 Sol: $2 in, $10 out per million tokens
- Claude Opus 5.5: $4 in, $20 out per million tokens
- GPT-6 Astra: $10 in, $50 out per million tokens
- Claude Fable 5.1: $10 in, $50 out per million tokens
- Claude Opus 5: $5 in, $25 out per million tokens
All prices side by side: AI model API price table. How we research: our method.
Sources
- OpenAI API docs: GPT-6 Sol (checked 2026-10-06)
- OpenAI API docs: Pricing (checked 2026-10-06)
- OpenAI API docs: Changelog (checked 2026-10-06)
- OpenAI API docs: Reasoning models (checked 2026-10-06)
- ChatGPT docs: Models (checked 2026-10-06)
- Artificial Analysis: GPT-6 Sol (max) (checked 2026-10-06)
- Artificial Analysis: GPT-6 Sol (medium) (checked 2026-10-06)
- Artificial Analysis: GPT-6.1 Sol vs GPT-6 Sol (checked 2026-10-06)
- Artificial Analysis: Coding agents (checked 2026-10-06)
- OpenRouter: GPT-6 Sol (checked 2026-10-06)