GPT-6.1 Sol
OpenAI
- Released
- September 29, 2026
- Data date
- September 29, 2026
- Predecessor
- GPT-6 Sol
- Price
- Input · Output / 1M tokens
- Input
- Text, Image
- Output
- Text
Profile
Specifications and access
Published information about this model. Existing estimates are explicitly labeled.
Dated documentation and model-card observations. Provider limits, native context and extended context can differ. Configuration notes retain the source wording.
| Specification | Value and source |
|---|---|
| Weights | ProprietarySource |
| Access | APISource |
| Context window | 1,050,000 tokensSource |
| Knowledge cutoff | April 30, 2026Source |
| Notes | OpenAI describes GPT-6.1 Sol as an upgrade to GPT-6 Sol for complex coding, computer-use and professional tasks. It is available through the API, ChatGPT Work and Codex, but not in ChatGPT Chat at launch.Source |
| API model ID | gpt-6.1-solSource |
| Maximum output | 128,000 tokensSource |
| Input | Text, ImageSource |
| Output | TextSource |
| Reasoning mode | low, medium, high, xhigh, max (default: medium)Source |
| Tool calling | YesSource |
| Structured output | YesSource |
| API interfaces | Responses API, Chat Completions APISource |
Pricing
Published prices
Prices apply to the stated unit. Resolution, output length, and provider can change the cost.
- API input
- $2 per 1M tokensSource
- API input
- $4 per 1M tokens (above 272,000 context tokens)Source
- API output
- $10 per 1M tokensSource
- API output
- $15 per 1M tokens (above 272,000 context tokens)Source
- Cache write
- $2.5 per 1M tokensSource
- Cache write
- $5 per 1M tokens (above 272,000 context tokens)Source
- Cache read
- $0.1 per 1M tokensSource
- Cache read
- $0.2 per 1M tokens (above 272,000 context tokens)Source
Head-to-head comparisons
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Model generations
Predecessor and successor
Every relationship names its kind, its qualification and the dated source it rests on.
Evidence
Sources and data date
Every statement links to its underlying documentation or leaderboard.
| Type | Evidence and data date |
|---|---|
| Price | Base API prices without caching or batch discounts. Higher context tiers and other rates are listed under Costs. |
| Input | Documented modalities. Retrieved September 29, 2026. |
| Output | Documented modalities. Retrieved September 29, 2026. |
| Research status | Research date September 29, 2026. 2 source URLs checked. This documents the inspected sources, not an exhaustive inventory of every publication. |
| Not found in the inspected sources | parameters-billions Original wording OpenAI does not publish parameter counts. |
| Unresolved | benchmarks Original wording The launch announcement describes comparative evaluations, but no exact score was transcribed into this record without an unambiguous numeric source table and configuration. |
| Additional source | Model metadata (retrieved September 29, 2026) |