Claude Fable 5 vs DeepSeek-V4-Flash-0731: Specs & Benchmark Comparison
Claude Fable 5 is developed by Anthropic, while DeepSeek-V4-Flash-0731 comes from DeepSeek. Claude Fable 5 was released in June 2026, and DeepSeek-V4-Flash-0731 followed a month later in July 2026. DeepSeek-V4-Flash-0731 has a published size of about 304 billion parameters; Anthropic has not disclosed the parameter count of Claude Fable 5.
The two models share 2 published benchmarks. They split them evenly, 1 to 1. The widest gaps are on AutomationBench, where DeepSeek-V4-Flash-0731 scores 25.1% against 17.4%; Terminal-Bench 2.1, where Claude Fable 5 scores 84.3% against 83.0%. Averaged across everything we track, Claude Fable 5 sits at 59.8% and DeepSeek-V4-Flash-0731 at 57.5%.
DeepSeek-V4-Flash-0731 is the cheaper API at $0.14 per million input tokens and $0.28 per million output tokens, roughly 71 times cheaper than Claude Fable 5 at $10 and $50. Both accept a context window of about 1M tokens. Claude Fable 5 accepts text and images as input, while DeepSeek-V4-Flash-0731 accepts text.
| Characteristic | Claude Fable 5 | DeepSeek-V4-Flash-0731 |
|---|---|---|
| Company | Anthropic | DeepSeek |
| Release Date | June 9, 2026 | July 31, 2026 |
| Parameters | — | 304B |
| Multimodal | Yes | No |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 128K | 393K |
| Input Price / 1M | $10.00 | $0.14 |
| Output Price / 1M | $50.00 | $0.28 |
| Average Score | 59.8% | 57.5% |
| Benchmarks | ||
| AutomationBench | 17.4% | 25.1% |
| Terminal-Bench 2.1 | 84.3% | 83.0% |
Visual Benchmark Comparison
Verdict
DeepSeek-V4-Flash-0731 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Claude Fable 5 — 0.6, DeepSeek-V4-Flash-0731 — 0.6.
DeepSeek-V4-Flash-0731 is 142.9x cheaper: input $0.14/1M vs $10.00/1M tokens.
Same context size: 1M tokens.
DeepSeek-V4-Flash-0731 is newer: released 7/31/2026 vs 6/9/2026.
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Frequently Asked Questions
Which is better for coding — Claude Fable 5 or DeepSeek-V4-Flash-0731?
Which model is cheaper — Claude Fable 5 or DeepSeek-V4-Flash-0731?
Which has a larger context window — Claude Fable 5 or DeepSeek-V4-Flash-0731?
The Claude Fable 5 and DeepSeek-V4-Flash-0731 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Fable 5 or DeepSeek-V4-Flash-0731 page. See also the complete list of AI model comparisons.