o1

by OpenAIChatretires 2026-10-23

O-series reasoning model for hard analysis, math, coding, and planning

Context
200K tokens
Max output
100,000 tokens
Released
2024-12-05
Weights
Closed

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openai/o1 · also seen as eu/o1-2024-12-17, o1-2024-12-17, us/o1-2024-12-17, openai/o1-2024-12-17

Specifications

Full facts as recorded, incl. what is unknown.

Released
2024-12-05
Weights
Closed
Input
Text, Image, PDF
Output
Text
Context window
200,000 max across endpoints
Max output
100,000
Providers
6 + 11 gateways, not counted as providers
Epoch Capabilities Index
141.8 ± 1.7 against price
Direct price range
$15.00–$19.50 in · $60–$78 out per 1M tokens · 3 of 6 providers have a comparable price
More details
Last updated
2025-01-01
Knowledge cutoff
2023-09
Developer country
United States of America

Capabilities

Across all endpoints: supported if any endpoint supports it.

  • Tool calling
  • Parallel tools
  • Structured output
  • Reasoning
  • Image input
  • PDF input
  • Audio input
  • Audio outputunknown
  • Video input
  • Prompt caching
  • Web searchunknown
  • Computer useunknown
  • System messages
  • Assistant prefillunknown
  • Temperature
  • Streamingunknown
  • Attachments

Endpoints

One row per provider and variant; gateways are listed separately.

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Price history

Atom feed

No change since 19 Oct 2026. The cheapest direct price has been $15 in / $60 out per 1M tokens at DigitalOcean on every data refresh since then.

Tracked from 19 Oct 2026. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON

Cost calculator

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Similarly priced models

Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).

ModelBlended/1MIn/1MOut/1MContextvs o1
Claude Opus 4Anthropic$22.50$13.50$67.50200K+0%
Claude Opus 4.1Anthropic$22.50$13.50$67.50200K+0%
Nano Banana ProGoogle$21.67$2.00$120131K−4% cheaper
Claude Opus 3Anthropic$25$15$75200K+11%
Claude Fable LatestAnthropic$16.67$10$501M−26% cheaper
Claude Fable 5Anthropic$16.67$10$501M−26% cheaper
Claude Fable 5.1Anthropic$16.67$10$501M−26% cheaper
GPT LatestOpenAI$16.67$10$501.05M−26% cheaper

More from OpenAI

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ModelReleasedContextListed price
GPT-6.1 Sol Ultrafast2026-10-081.05Mfrom $12
GPT-6 Luna Decisions2026-10-061.05Munpriced
GPT-6.1 Sol2026-09-291.05Mfrom $2.00
GPT-6.1 Sol Pro2026-09-291.05Mfrom $2.00
GPT-6 Luna2026-09-221.05Mfrom $0.10
GPT-6 Sol2026-09-221.05Mfrom $2.00
GPT-6 Sol Pro2026-09-221.05Mfrom $2.00
GPT-6 Luna Pro2026-09-221.05Mfrom $0.10
Heads up: prices are indicative list rates scraped from provider pricing pages; verify with the provider before relying on them. Report incorrect data for this model