When was GPT-6.1 Sol released?

OpenAI released it on 29 September 2026, the day of DevDay 2026, according to the API changelog.

How much does GPT-6.1 Sol cost?

$2 per million input tokens and $10 per million output tokens at the standard rate, with cached input at $0.10 per million.

How does GPT-6.1 Sol differ from GPT-6 Sol?

It keeps GPT-6 Sol's $2 input and $10 output prices but halves cached input from $0.20 to $0.10 per million tokens, and OpenAI reports higher coding and computer-use scores.

GPT-6.1 Sol news

Large language model2 stories

GPT-6.1 Sol is a reasoning model released by OpenAI on 29 September 2026 at its DevDay event.

Gaming PCs with glowing RGB fans and open glass cases on display at a trade show booth in Las Vegas. — Epoch AI launches SpireClimb: frontier models win 90% of base Slay the Spire runs, 20% at max

AI Models14 Oct 2026, 09:00 UTC

Epoch AI's new SpireClimb benchmark, published 14 October 2026, finds frontier models win 90%+ of base Slay the Spire games and up to 20% at maximum difficulty.

Summary

Epoch AI published results from SpireClimb, a new benchmark built on the card games Slay the Spire and Slay the Spire 2, on 14 October 2026. Models play through a visual computer-use harness. Frontier models now win at least 90% of base-difficulty games, up from struggling six months earlier. At maximum difficulty, GPT-6.1 Sol won 20% and GPT-6 Astra 17%. Top human players win 80% or more.

Earlier stories

OpenAI releases GPT-6.1 Sol at $2 per 1M input tokens, one-fifth of GPT-6 Astra's price
AI Models29 Sep 2026

About GPT-6.1 Sol

GPT-6.1 Sol is a reasoning model released by OpenAI on 29 September 2026 at its DevDay event. It follows GPT-6 Sol in the GPT-6 family, has a 1,050,000-token context window and is aimed at complex coding, computer use and professional work at one-fifth of GPT-6 Astra's standard token prices.

Reviewed 28 Oct 2026 · by OpenAI

Facts at a glance

Developer: OpenAI
Released: 29 September 2026 source
API name: gpt-6.1-sol source
Context window: 1,050,000 tokens (922,000 max input) source
Max output: 128,000 tokens source
Knowledge cutoff: 30 April 2026 source
API price: $2 per 1M input tokens, $0.10 cached input, $2.50 cache writes, $10 per 1M output tokens source
Preparedness Framework: Treated as Critical in cybersecurity and High in biological and chemical capability source

More about GPT-6.1 Sol (show)

What GPT-6.1 Sol is used for

OpenAI says GPT-6.1 Sol delivers near-Astra performance at a lower cost for complex coding, computer use and professional work. Reasoning effort runs from low to max with medium as the default; the none level is not supported. Tool calling requires the Responses API, where the model also supports multi-agent delegation in beta. Fine-tuning is not supported. Since 8 October 2026 it can also run in the paid Ultrafast tier, which OpenAI prices at six times the standard rate.

Questions people ask

When was GPT-6.1 Sol released?: OpenAI released it on 29 September 2026, the day of DevDay 2026, according to the API changelog.
How much does GPT-6.1 Sol cost?: $2 per million input tokens and $10 per million output tokens at the standard rate, with cached input at $0.10 per million.
How does GPT-6.1 Sol differ from GPT-6 Sol?: It keeps GPT-6 Sol's $2 input and $10 output prices but halves cached input from $0.20 to $0.10 per million tokens, and OpenAI reports higher coding and computer-use scores.

GPT-6.1 Sol news

Every story about GPT-6.1 Sol

Epoch AI launches SpireClimb: frontier models win 90% of base Slay the Spire runs, 20% at max

Earlier stories

OpenAI releases GPT-6.1 Sol at $2 per 1M input tokens, one-fifth of GPT-6 Astra's price