o3
Snapshot o3-2025-04-16 (and o3-pro-2025-06-10) deprecated Jun 11 2026, shutdown Dec 11 2026; replace with gpt-5.6-*. o4-mini-2025-04-16 shuts down Oct 23 2026.
- Context window
- 200,000 tokens
- Max output
- 100,000 tokens
- Knowledge cutoff
- 2024-06
- Input
- text, image
- Output
- text
- License
- proprietary
- Pricing
- input: $2 · cached input: $0.5 · output: $8 (per 1M tokens (USD), standard tier) source
- Verified
- 2026-09-29
How to call it
| Provider | Model id | Endpoint / URL | Docs |
|---|---|---|---|
| OpenAI API | o3 | https://api.openai.com/v1/responses | docs |
| Azure OpenAI (Microsoft Foundry) | o3 | — | docs |
| OpenRouter | openai/o3 | openrouter.ai/openai/o3 | — |
Notable capabilities (2)
- Thinking with images: Reasoning model accepting image input with reasoning tokens. source
- Successor: GPT-5 (found after launch): Docs mark o3 as succeeded by GPT-5; o-series is legacy. source
curl https://api.openai.com/v1/responses \
-H "Authorization: Bearer $OPENAI_API_KEY" -H "Content-Type: application/json" \
-d '{"model":"o3","input":"Hello"}'
Sources:
Other OpenAI models
GPT-6 Luna · GPT-6 Sol · GPT Image 2.5 Flare · GPT Image 2.5 Sunburst · GPT-6 Astra · GPT-Live-Transcribe · GPT-Transcribe · GPT-5.6 Terra · GPT-Live 1 · GPT-Realtime-2.1 · GPT-Realtime-2 · GPT-Realtime-Translate · GPT-Rosalind · GPT-Audio-1.5 (and gpt-audio / gpt-audio-mini) · GPT-5.3-Codex · gpt-oss-120b · gpt-oss-20b · GPT-4o mini TTS · text-embedding-3-large · text-embedding-3-small · GPT-5.6 Luna · GPT-5.6 Sol · GPT-Realtime-Whisper · GPT-5.5 Pro · GPT-5.5 · GPT Image 2 · GPT-5.4 · GPT-Realtime-1.5 · GPT-4.1 · GPT-4o · TTS-1 / TTS-1 HD · Whisper large-v3 / large-v3-turbo (open weights) · GPT-Realtime and GPT-Realtime mini · GPT-4o Transcribe / Mini Transcribe / Transcribe Diarize · Whisper (whisper-1 API) · Sora 2