Claude Fable 5 vs Gemini 3.5 Flash
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Claude Fable 5
Anthropic · Jun 2026
The first GA model of Anthropic's Mythos class — a tier above Opus — and the current SWE-bench Verified leader, at $10/$50 per 1M tokens.
Gemini 3.5 Flash
Google · May 2026
Google's I/O 2026 headliner: near-Pro intelligence at Flash speed, 78.8% on SWE-bench Verified with full multimodal input.
The verdict
Claude Fable 5 wins 1 of the 1 benchmarks these models share, against 0 for Gemini 3.5 Flash. On price the gap is dramatic: Gemini 3.5 Flash works out roughly 5.9x cheaper per blended million tokens.
Benchmark head-to-head 1–0
Specs & pricing
| Claude Fable 5 | Gemini 3.5 Flash | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $10 | $1.5 |
| Output price / 1M | $50 | $9 |
| Context window | 1M | 1M |
| Max output | 128K | 66K |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image | text, image, audio, video |
| Knowledge cutoff | Jan 2026 | Feb 2026 |
| Released | Jun 2026 | May 2026 |
| Example monthly cost* | $175.00 | $28.50 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Claude Fable 5 or Gemini 3.5 Flash?
- Claude Fable 5 wins 1 of the 1 benchmarks these models share, against 0 for Gemini 3.5 Flash. On price the gap is dramatic: Gemini 3.5 Flash works out roughly 5.9x cheaper per blended million tokens.
- Which is cheaper, Claude Fable 5 or Gemini 3.5 Flash?
- Claude Fable 5 costs $10/$50 per million input/output tokens, while Gemini 3.5 Flash costs $1.5/$9. For a typical workload of 10M input and 1.5M output tokens per month, that's $175.00 versus $28.50.
- Which model is better for coding, Claude Fable 5 or Gemini 3.5 Flash?
- On SWE-bench Verified — the standard agentic-coding benchmark — Claude Fable 5 scores ~95% versus 78.8% for Gemini 3.5 Flash, making Claude Fable 5 the stronger pick for coding agents.
More comparisons
Claude Fable 5 vs GPT-5.5Gemini 3.5 Flash vs GPT-5.5Claude Fable 5 vs GPT-5.2Gemini 3.5 Flash vs GPT-5.2Claude Fable 5 vs GPT-5.1Gemini 3.5 Flash vs GPT-5.1Claude Fable 5 vs GPT-5Gemini 3.5 Flash vs GPT-5Claude Fable 5 vs GPT-5 miniGemini 3.5 Flash vs GPT-5 miniClaude Fable 5 vs OpenAI o3Gemini 3.5 Flash vs OpenAI o3