Claude Fable 5 vs Gemini 2.5 Flash
Pricing, benchmarks, and use case comparison
Quick take
- •Claude Fable 5 is meaningfully stronger at coding (99 vs 75 on our capability index).
- •Gemini 2.5 Flash is meaningfully stronger at cost efficiency (92 vs 55).
- •Gemini 2.5 Flash is 97% cheaper on input tokens, which compounds fast on high-volume or agentic workloads.
- •Claude Fable 5 has a 1M context window vs 1,048,576 tokens (1M) input; up to 65,535 output - better for whole-repo or long-document work.
Specs comparison
| Claude Fable 5 | Gemini 2.5 Flash | |
|---|---|---|
| Provider | Anthropic | Google DeepMind |
| Type | Closed source | Closed source |
| Context window | ✓1M | 1,048,576 tokens (1M) input; up to 65,535 output |
| Input / 1M tokens | $10.00 | ✓$0.30 |
| Output / 1M tokens | $50.00 | $2.50 |
| Release date | 2026-06 | 2025-06 |
Benchmarks
| Benchmark | Claude Fable 5 | Gemini 2.5 Flash |
|---|---|---|
| SWE-bench Verified | 95.0% | - |
| Terminal-Bench 2.1 | 88.0% | - |
| GPQA Diamond | 92.6% | - |
| SWE-bench Pro | 80.3% | - |
| Context window | - | 1M tokens |
| Input price | - | $0.30/1M |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Claude Fable 5 if...
- →You need the absolute highest capability Anthropic offers for hard tasks
- →You run long, complex autonomous agents where quality compounds over many steps
- →You do frontier-level engineering, research, or analytics and cost is secondary
- →You want maximum accuracy on the toughest coding and reasoning benchmarks
Choose Gemini 2.5 Flash if...
- →High-volume, latency-sensitive production workloads
- →Chatbots, extraction, classification, and summarization at scale
- →You need decent reasoning but must control costs