o3
ModelActiveby OpenAI · family “o”
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.... (description from the OpenRouter listing)
in: imagein: textin: fileout: textReasoningTool useStructured output
Epoch Capabilities Index
146.9 #63 of 268
90% CI 145.0 – 148.5
Released
16 Apr 2025
Context window
200K tokens
Max output
100K tokens
Input $ / 1M tokens
$2.00
Output $ / 1M tokens
$8.00
Cached input $ / 1M
$0.50
Each benchmark shown separately with its own source
Benchmark results (20)
| Benchmark | Domain | Score | vs best recorded | Setting | Run | Source |
|---|---|---|---|---|---|---|
| LMCA | agents | 39.7% | 61% | high | — | External ↗ |
| DTBench | reasoning | 84.8% | 86% | high | — | External ↗ |
| Mystery Game Puzzles | games | 29.0% ±4.6 | 35% | high | 27 Aug 2026 | Epoch ↗ |
| FrontierMath-Tiers-1-3-v2-Private | math | 33.3% ±2.8 | 36% | high | 27 Aug 2026 | Eval log ↗ |
| CL-bench | long-context | 17.8% | 64% | high | — | External ↗ |
| Chess Puzzles | games | 34.0% ±4.8 | 47% | high | 7 Aug 2026 | Eval log ↗ |
| SimpleQA Verified | knowledge | 49.4% ±1.6 | 65% | high | 27 Aug 2026 | Eval log ↗ |
| FrontierMath-Tier-4-2025-07-01-Privatesuperseded | math | 2.1% ±2.1 | 4% | high | 1 Jul 2025 | Epoch ↗ |
| GSO-Bench | coding | 8.8% | 19% | high | — | External ↗ |
| ARC-AGI-2 | reasoning | 6.5% | 7% | high | — | External ↗ |
| GeoBench | multimodal | 60.0% | 68% | high | — | External ↗ |
| FrontierMath-2025-02-28-Privatesuperseded | math | 18.7% ±2.3 | 36% | high | 16 Nov 2025 | Epoch ↗ |
| HLE | knowledge | 20.3% | 37% | high | — | External ↗ |
| WeirdML | coding | 52.4% ±0.0 | 56% | high | — | External ↗ |
| Aider polyglot | coding | 81.3% | 92% | high | — | External ↗ |
| OTIS Mock AIME 2024-2025 | math | 83.9% ±4.4 | 84% | high | 16 Apr 2025 | Eval log ↗ |
| SimpleBench | reasoning | 53.1% | 65% | high | — | External ↗ |
| GPQA diamond | science | 81.8% ±2.1 | 85% | high | 16 Apr 2025 | Eval log ↗ |
| MATH level 5 | math | 97.8% ±0.3 | 100% | high | 16 Apr 2025 | Epoch ↗ |
| ARC-AGI | reasoning | 60.8% | 62% | high | — | External ↗ |
Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.
API list price over time
Price history
$ per 1M tokens
13 observations (OpenRouter listing + Internet Archive snapshots). History accumulates with every ingest run; a single point means no change has been observed yet.
Events
- Benchmark33d agoEpoch AI evaluates o3Epoch AI Benchmarking Hub