o1
OpenAI's original flagship reasoning model — now superseded by o3, but still available and capable.
Pricing
Input$15 / 1M checked Jul 19, 2026
Cached input$7.50 / 1M
Output$60 / 1M checked Jul 19, 2026
Superseded by o3 at lower cost.
Cost bandPremium
Free tierNo free API tier.
Limits
Context window200k checked Jul 19, 2026
Max output100k
Knowledge cutoffOct 1, 2023
DeploymentOpenAI API
OpenAI-compatible APIYes
ModalitiesText, Image input
Where it fits
Best forLegacy integrations and teams not yet migrated to o3/o4-mini.
Business fitMigrate to o3 or o4-mini for new projects.
Capabilities
Extended thinkingFunction callingVision
Benchmark scores
Composite86 / 100
Coding88 / 100 (SWE-bench Verified)
Reasoning90 / 100 (GPQA Diamond)
Long context82 / 100 (RULER 200K)
Vision80 / 100 (MMMU)
Instruction following88 / 100 (IFEval)
Editorial aggregate of published benchmark results as of Jan 1, 2025. These are not independent measurements run by this site.
Change history
No recorded changes for this model yet. Pricing and context are checked daily; changes appear here with dates and sources.
Data
Last checkedJul 19, 2026
Cross-checked againstopenrouter.ai/openai/o1
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