Model board / GPT-6.1 Sol

Verified 2026-10-01 against the pages listed below. Prices are USD per 1M tokens, list rate — no committed-use, enterprise or volume discount.

released 2026-09-29. Above 272K input tokens the whole request bills at 2x input and cache and 1.5x output: $4.00/$0.20/$5.00/$15.00. Batch halves every column. Same input and output as GPT-6 Sol; the cache read is half, at 0.05x input

1,050,000 window and 128,000 max output, both on the model's own page

cached input at 0.05x base — the prompt-caching guide names GPT-6.1 Sol as the one exception to the 0.1x on every other GPT-5.6-and-later row; implicit or explicit-only mode, and an entry lives at least 30 minutes after its last write or reuse

Watch out

Reasoning effort starts at low — none and minimal are not supported, where GPT-6 Sol offers none — so moving a no-thinking workload from GPT-6 Sol raises its output bill even at the same list price. Above 272K input every token in the request bills at the higher tier

What we would use it for

OpenAI's recommended balance of capability and cost from 2026-09-29, and the cheapest cache read of any OpenAI row relative to its input

What this has cost, week by week

Output price at each refresh since 2026-10-01. A vendor change is the provider changing its price. Our correction means this board changed what it prints and the provider's charge did not move — the two are never merged, because publishing the second as the first would be a price rise that never happened.

Nothing has moved since we started tracking it.

Where these numbers came from

• https://developers.openai.com/api/docs/pricing
• https://developers.openai.com/api/docs/models
• https://developers.openai.com/api/docs/models/gpt-6.1-sol
• https://developers.openai.com/api/docs/guides/prompt-caching
• https://developers.openai.com/api/docs/changelog

No number on this page was written that was not read from one of those pages on 2026-10-01. If one is wrong, send us the source URL and it is corrected in the next weekly refresh, with a changelog line saying what was wrong — contact@naderu.com.

Jobs this is one of our picks for

• Agentic coding — Long tool-use loops over whole repos (agentic-coding)
• Code review — Read a diff or a repository and say what is wrong (code-review)

Discussed in Naderu Weekly

• Same price, new rules — 2026-10-01

The rest of the board

This row sits alongside 66 others on the model board, refreshed every week. The same data as JSON, and the terms for using it, are at /board-data.