Head-to-head
Claude Opus 4.8 vs GPT-5.5
As of October 25, 2026, GPT-5.5 leads Claude Opus 4.8 on the Analyzer Index, 91.2 to 83.9.
Normalized scores are min-maxed per benchmark across all models we track (0–100). Open the interactive compare view to add benchmarks to the radar chart or pull in more models.
Claude Opus 4.8
AnthropicGPT-5.5
OpenAI| At a glance | Claude Opus 4.8 | GPT-5.5 |
|---|---|---|
| Analyzer Index | 83.9 (6/13) | 91.2 (7/13) |
| Blended price | $10.00/M | $5.63/M |
| Cheapest host | maker's API | maker's API |
| Context | 1.0M | 400k |
| Output speed | 55 tok/s | 104 tok/s |
| Time to first token | 0.94 s | 2.23 s |
| Benchmark | Claude Opus 4.8 | GPT-5.5 |
|---|---|---|
Chatbot Arena Elo Arena | ||
Output Speed Speed | ||
Time to First Token TTFT | ||
FrontierMath Tiers 1-3 FrontierMath | ||
SimpleQA Verified SimpleQA | ||
OTIS Mock AIME 2024-2025 OTIS AIME | ||
ARC-AGI 2 ARC-AGI 2 | ||
Terminal-Bench 2 TermBench 2 | — | |
Frontier Composite Frontier | ||
Output Stability Stability | ||
Format Adherence Format | ||
Recovery Rate Recovery | ||
API Success Rate API OK | ||
Safety Handling Safety |
Methodology matches the main AI Model Analyzer About page.