Compare models
Pick up to 4 models for a side-by-side spec sheet. Hover any dotted metric name for what the test measures. Best value in each row is highlighted.
Claude Opus 4.6GPT-5.3-Codex
| Claude Opus 4.6 Anthropic | GPT-5.3-Codex OpenAI | |
|---|---|---|
| Pricing | ||
| Input $/1M | $5.00 | $1.75 |
| Output $/1M | $25.00 | $14.00 |
| Blended $/1M (3:1) | $10.00 | $4.81 |
| Cache read $/1M | $0.50 | $0.175 |
| Cache write $/1M | $6.25 | — |
| Quality indices | ||
| Intelligence Index | 37.8 | 44.3 |
| Coding Index | — | — |
| Math Index | — | — |
| Agentic Index | — | — |
| Speed & latency | ||
| Output speed (tok/s) | 54 | 126 |
| Time to first token | 1.89s | 51.38s |
| Time to first answer token | 1.89s | 51.38s |
| Benchmarks (Artificial Analysis) | ||
| GPQA Diamond | 84.0% | 91.5% |
| Humanity's Last Exam | 18.6% | 39.9% |
| SciCode | 45.7% | 53.2% |
| IFBench | 44.6% | 75.4% |
| AA-LCR (Long Context Reasoning) | 58.3% | 74.0% |
| Terminal-Bench Hard | 48.5% | 53.0% |
| τ²-Bench (Telecom) | 84.8% | 86.0% |
| Design Arena (Elo) | ||
| Website | 1,323 | 1,190 |
| Web apps | 1,261 | 1,103 |
| Full-stack | 1,279 | 1,041 |
| Mobile apps | 1,280 | 1,127 |
| Android native | 1,195 | 1,084 |
| UI components | 1,336 | 1,179 |
| Data viz | 1,322 | 1,199 |
| SVG | 1,274 | 1,176 |
| 3D | 1,335 | 1,067 |
| Game dev | 1,337 | 1,219 |
| Godot game dev | — | 1,124 |
| Code categories | 1,327 | 1,178 |
| ASCII art | 1,298 | 1,193 |
| Specs | ||
| Context window | 1M | 400K |
| Max output tokens | 128K | 128K |
| Input modalities | text, image, file | text, image, file |
| Tokenizer | Claude | GPT |