Claude Fable 5 vs o1
Pricing, benchmarks, and use case comparison
Quick take
- •Claude Fable 5 leads on 1 of 1 shared benchmarks, including GPQA Diamond (92.6% vs 77.3%).
- •Claude Fable 5 is meaningfully stronger at multimodal (92 vs 60 on our capability index).
- •Claude Fable 5 is 33% cheaper on input tokens, which compounds fast on high-volume or agentic workloads.
- •Claude Fable 5 has a 1M context window vs 200,000 tokens (100,000 max output) - better for whole-repo or long-document work.
Specs comparison
| Claude Fable 5 | o1 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Type | Closed source | Closed source |
| Context window | ✓1M | 200,000 tokens (100,000 max output) |
| Input / 1M tokens | ✓$10.00 | $15.00 |
| Output / 1M tokens | $50.00 | $60.00 |
| Release date | 2026-06 | 2024-12 |
Benchmarks
| Benchmark | Claude Fable 5 | o1 |
|---|---|---|
| SWE-bench Verified | 95.0% | - |
| Terminal-Bench 2.1 | 88.0% | - |
| GPQA Diamond | ✓92.6% | 77.3% |
| SWE-bench Pro | 80.3% | - |
| AIME 2024 | - | 74% |
| Codeforces | - | ~89th percentile |
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 o1 if...
- →Hard, multi-step math, science, and logic problems that reward deliberate reasoning
- →Competitive programming and algorithmic problem solving
- →Existing o1-based pipelines already validated for reasoning tasks