OpenAI o3
OpenAI
OpenAI's o3 reasoning model (April 2025), which replaced o1 as the primary reasoning model at an ~87% lower price. o3 set state-of-the-art results on Codeforces, SWE-bench, and MMMU, reasons with images, and makes ~20% fewer major errors than o1 on hard real-world tasks.
Strengths
- State-of-the-art reasoning on Codeforces, SWE-bench, and MMMU at launch
- ~87% cheaper than o1 with improved performance
- Reasons with images (visual chain-of-thought)
- Strong SWE-bench Verified coding without a custom scaffold
- ~20% fewer major errors than o1 on hard real-world tasks
Caveats
- 200K context is smaller than GPT-5.x's 1M+
- Reasoning latency is higher than non-reasoning models
- Superseded by newer GPT-5.x for many general tasks
- Vendor
- OpenAI
- Context Window
- 200,000 tokens
- Max Output
- 100,000 tokens
- License
- Proprietary
- Release Date
- 2025-04-16
- Modalities
- textimage
Capabilities
Vision
Audio
Video
Tool Use
Resources
Pricing
$2 per 1M input tokens, $8 per 1M output tokens - an ~87% price cut versus o1 ($15/1M input) with improved performance.