Head-to-head
Claude Fable 5.1 vs Gemini 3.5 Flash
As of October 25, 2026, Claude Fable 5.1 leads Gemini 3.5 Flash on the Analyzer Index, 93.7 to 82.6.
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 Fable 5.1
AnthropicGemini 3.5 Flash
Google| At a glance | Claude Fable 5.1 | Gemini 3.5 Flash |
|---|---|---|
| Analyzer Index | 93.7 (6/13) | 82.6 (6/13) |
| Blended price | $20.00/M | $1.69/M |
| Cheapest host | maker's API | maker's API |
| Context | 1.0M | 1.0M |
| Output speed | — | 369 tok/s |
| Time to first token | — | 13.68 s |
| Benchmark | Claude Fable 5.1 | Gemini 3.5 Flash |
|---|---|---|
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 | ||
Humanity's Last Exam HLE | — | |
ARC-AGI 2 ARC-AGI 2 | ||
Frontier Composite Frontier | ||
Output Stability Stability | — | |
Format Adherence Format | — | |
Recovery Rate Recovery | — | |
Safety Handling Safety | — |
Methodology matches the main AI Model Analyzer About page.