OpenAI · Released Apr 16, 2025
o3
o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following....
- Top 12%Aider Polyglot
- Top 13%Fiction.LiveBench
- Top 15%Lech Mazur Writing
- Top 34%VPCT
- Released
- Apr 16 2025
- Context window
- 200K 100K out
- Input / 1M tokens
- $2.00
- Output / 1M tokens
- $8.00
Where to run it
Providers
Only OpenAI serves o3 on OpenRouter right now.
| Provider | Input | Output | Cache read | Context | Max output | Uptime | vs. best |
|---|---|---|---|---|---|---|---|
| OpenAI | $2.00 | $8.00 | $0.50 | 200K | 100K | 100%24h | Cheapest |
Value
Price vs. performance
o3 Other OpenAI Other labs Value frontier · GPQA Diamond vs. input price per 1M tokens (log scale) · Drag to pan, pinch or Ctrl + scroll to zoom, double-click to zoom in.
Benchmarks
22 benchmark scores
| Benchmark | Score | Rank | Leader |
|---|---|---|---|
| SWE-bench VerifiedSoftware engineering · Real GitHub issues fixed in Python repos | 62.3% | #24of 32 | Claude Opus 4.783.5% |
| GSOSoftware engineering · Optimize real code to make it significantly faster | 8.8% | #17of 27 | Claude Fable 5.188.2% |
| Aider PolyglotSoftware engineering · Hard Exercism problems in many languages | 81.3% | #3of 26 | GPT-588.0% |
| METR time horizonSoftware engineering · Length of software task solved more often than not | 2 h | #10of 23 | Claude Opus 4.612 h |
| OSWorldAgents & computer use · Desktop and web tasks with keyboard and mouse | 23.0% | #5of 6 | Claude Sonnet 4.672.1% |
| GDPvalAgents & computer use · Real-world occupational tasks, win rate vs experts | 30.8% | #6of 13 | GPT-5.249.7% |
| Lech Mazur WritingWriting & content · Short stories weaving 10 required elements, judged 0–10 | 8.39/10 | #4of 27 | GPT-58.60/10 |
| Fiction.LiveBenchWriting & content · Understanding long creative writing (16k tokens) | 88.9% | #3of 24 | GPT-597.2% |
| DeepResearch BenchWriting & content · Find and synthesize information from the web | 45.2% | #12of 21 | Claude Opus 4.655.3% |
| SimpleQA VerifiedWriting & content · Factual accuracy on 1,000 short questions | 49.4% | #27of 79 | Gemini 4 Argon76.0% |
| VPCTDesign & visual · Read diagrams of balls rolling down ramps | 52.0% | #6of 18 | GPT-5.284.0% |
| GeoBenchDesign & visual · Guess the country a photo was taken in | 74.0% | #5of 15 | Gemini 3 Flash Preview88.0% |
| GPQA DiamondReasoning & knowledge · PhD-level biology, chemistry and physics questions | 81.8% | #69of 122 | Gemini 4 Argon96.4% |
| Humanity's Last ExamReasoning & knowledge · Expert questions across 100+ subjects | 20.3% | #17of 32 | GPT-6 Astra54.8% |
| ARC-AGI-2Reasoning & knowledge · Few-shot abstract reasoning on grid puzzles | 6.5% | #52of 75 | GPT-6 Astra95.0% |
| ARC-AGI-1Reasoning & knowledge · Pattern induction from input–output examples | 60.8% | #52of 75 | Gemini 4 Argon98.5% |
| SimpleBenchReasoning & knowledge · Common-sense trick questions about space, time and people | 53.1% | #32of 58 | Claude Fable 581.9% |
| CritPtReasoning & knowledge · Open-ended, research-level physics problems | 1.4% | #75of 111 | GPT-5.6 Sol32.3% |
| Chess PuzzlesReasoning & knowledge · Find the single best move in 100 new puzzles | 37.0% | #38of 83 | GPT-6 Astra76.0% |
| LMCAReasoning & knowledge · Judge the quality of conceptual arguments like experts | 39.7% | #52of 123 | Claude Sonnet 5.568.3% |
| FrontierMathMaths · Expert-written problems, undergrad to early research (tiers 1–3) | 33.3% | #62of 87 | GPT-6.1 Sol93.7% |
| OTIS Mock AIMEMaths · Competition-style problems harder than MATH Level 5 | 84.4% | #66of 120 | Gemini 4 Argon100.0% |
Specs
Details
- Model ID
openai/o3- Developer
- OpenAI
- Release date
- Apr 16, 2025 ·
- Context window
- 200,000 tokens
- Max output
- 100,000 tokens
- API price
- $2.00 / $8.00 per 1M input / output tokens
- Providers
- 1
- Input types
- image, text, file
- Reasoning
- Yes
- Tool calling
- Yes
- Open weights
- No
- Free tier
- No
Release date, prices and providers from OpenRouter's catalog; buying directly from a provider can cost a little differently. Uptime is the share of OpenRouter requests each provider served over the last day. Benchmark scores are the best result per benchmark from Epoch AI, licensed CC BY 4.0. Rank counts every model tracked here with a score.