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O3 — and what?

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 1 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

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O3
openai/o3
Provider
OpenAI
Family
o-series
Modality
text
Context window
200,000 tok
Max output
100,000 tok
Released
2026-05-22
License
Open-weight
Input price
$2.00 /1M
Output price
$8.00 /1M
Tools
Streaming
yes
Vision
JSON mode
Reasoning
Prompt caching
Batch API
Try it
Open in playground →
O3
openai/o3
Full spec →

o3 is OpenAI’s general-purpose reasoning model, balancing strong analytical performance with reasonable latency and cost.

Strengths
  • General-purpose chat
  • Long context
  • Tool use
Use cases
ChatbotsContent generationAgentic workflows

Compare with another

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Gemini 3.1 Pro vs O3
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Claude Sonnet 4.6 vs O3
anthropic/claude-sonnet-4.6 · openai/o3
GPT-5.5 vs O3
openai/gpt-5.5 · openai/o3
O3 vs Gemini 2.5 Pro
openai/o3 · google/gemini-2.5-pro
O3 vs Kimi-K2.6
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O3 vs Qwen 3.5 397B A17B
openai/o3 · alibaba/qwen3.5-397b-a17b
O3 vs Grok 4.20 Multi-Agent
openai/o3 · xai/grok-4.20-multi-agent-0309