Claude Fable 5 vs DeepSeek V4
Pricing, benchmarks, and use case comparison
Quick take
- •Claude Fable 5 leads on 1 of 1 shared benchmarks, including SWE-bench Verified (95.0% vs 80.6%).
- •Claude Fable 5 is meaningfully stronger at multimodal (92 vs 10 on our capability index).
- •DeepSeek V4 is meaningfully stronger at cost efficiency (88 vs 55).
- •DeepSeek V4 is open-weights (free to self-host); Claude Fable 5 is paid API only.
Specs comparison
| Claude Fable 5 | DeepSeek V4 | |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Type | Closed source | Open source |
| Context window | 1M | 1M tokens |
| Input / 1M tokens | $10.00 | ✓Free (self-host) |
| Output / 1M tokens | $50.00 | Free (self-host) |
| Release date | 2026-06 | 2026-04 |
Benchmarks
| Benchmark | Claude Fable 5 | DeepSeek V4 |
|---|---|---|
| SWE-bench Verified | ✓95.0% | 80.6% |
| Terminal-Bench 2.1 | 88.0% | - |
| GPQA Diamond | 92.6% | - |
| SWE-bench Pro | 80.3% | - |
| Math / STEM / Coding (open-model comparison) | - | Best among open models (per DeepSeek) |
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 DeepSeek V4 if...
- →You need a frontier-class open model you can self-host for data control
- →Your workload involves very long documents, codebases, or agent trajectories (up to 1M tokens)
- →You want top-tier agentic coding at a fraction of closed-model cost
- →You need to fine-tune or customize a strong base model