OpenAI
GPT-6 Sol
GPT-6 Sol is a OpenAI model with 1.05M context, $2 in / $10 out per million tokens, last verified September 26, 2026. Open weights: no. Public-board scores are linked to the publisher; vendor-only figures stay in the watch-out, not on the board.
GPT-6 Sol brings GPT-6 Astra's training advances to OpenAI's mid-priced tier — OpenAI claims roughly half GPT-5.6 Sol's factual-error rate at half its price, with a 1.05M-token context.
Catalog record checked September 26, 2026Individual provider fields may change
| Specification | GPT-6 Sol |
|---|---|
| Provider | OpenAI |
| Tier | Balanced |
| Context window | 1.05M |
| Max output | 128K |
| Input / 1M tokens | $2 |
| Output / 1M tokens | $10 |
| Weights | Closed |
| Parameters | GPT-6 mid-price tier |
| Reasoning levels | none, low, medium, high, xhigh, max |
| Modalities | text, image |
| API model id | gpt-6-sol |
| Released | September 22, 2026 |
Pricing tiers: Replaces GPT-5.6 Sol at 50% of its $4/$20 promo price. Cached input $0.20/MTok; cache writes $2.50 (1.25x). Above 272K input the whole request bills $4/$15 ($0.40 cached). Batch/Flex $1/$5; Fast mode $4/$20. Knowledge cutoff Apr 20 2026. Launched in the API, ChatGPT Work and Codex the same day.
Verified evidence
Published benchmark results
Each result keeps its source and measurement date visible. A missing benchmark is not treated as a zero.
| Benchmark | Score | Measured | Source |
|---|---|---|---|
| Artificial Analysis Intelligence Index [max] | 47.5 | 2026-09-26 | Artificial Analysis · View source |
| DeepSWE 1.1 [max] | 68.8 | 2026-09-22 | OpenAI — Introducing GPT-6 Sol and Luna (vendor; not yet on Datacurve's board) · View source |
| OSWorld 2.0 (offline) [xhigh] | 60.5 | 2026-09-22 | OpenAI — Introducing GPT-6 Sol and Luna (vendor) · View source |
| Terminal-Bench 4.0 [max] | 43.9 | 2026-09-26 | Artificial Analysis Terminal-Bench 4.0 (independent AA run, part of Intelligence Index v4.3.2) · View source |
Best for
- Default OpenAI production model
- Agentic coding
- Long-context knowledge work
Watch out
History
GPT-6 Sol timeline
Release and status events for this model that passed two-source verification — dated, sourced, and linked.
- GPT-6 SolReleaseSeptember 22, 2026
OpenAI launches GPT-6 Sol at $2/$10 per MTok — half GPT-5.6 Sol's price — with a 1.05M-token context, in the API, ChatGPT Work and Codex the same day. OpenAI reports 68.8% on DeepSWE 1.1 at max effort.
OpenAI — Introducing GPT-6 Sol and Luna
Source receipts
Catalog figures for this model were checked against the following sources.
- OpenAI — Introducing GPT-6 Sol and Luna (accessed 2026-09-26)
- OpenAI model docs — gpt-6-sol (1.05M context, 128K output) (accessed 2026-09-26)
- OpenAI API pricing (gpt-6-sol $2/$10, cached $0.20) (accessed 2026-09-26)
- OpenAI API changelog (Sep 22 2026) (accessed 2026-09-26)
Common questions
GPT-6 Sol
Answered from the verified figures on this page rather than general guidance.
How much does GPT-6 Sol cost per million tokens?
What is GPT-6 Sol's context window?
What is GPT-6 Sol best for?
Compare it
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