Claude Opus 5 vs DeepSeek-V4-Flash-0731: Specs & Benchmark Comparison
Claude Opus 5 is developed by Anthropic, while DeepSeek-V4-Flash-0731 comes from DeepSeek. Both were released 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 Opus 5.
We have 13 benchmark results for Claude Opus 5 and 9 benchmark results for DeepSeek-V4-Flash-0731, but they overlap on a single test: AutomationBench, where Claude Opus 5 scores 26.0% against 25.1%.
DeepSeek-V4-Flash-0731 is the cheaper API at $0.14 per million input tokens and $0.28 per million output tokens, roughly 36 times cheaper than Claude Opus 5 at $5 and $25. Both accept a context window of about 1M tokens. Claude Opus 5 accepts text and images as input, while DeepSeek-V4-Flash-0731 accepts text.
| Characteristic | Claude Opus 5 | DeepSeek-V4-Flash-0731 |
|---|---|---|
| Company | Anthropic | DeepSeek |
| Release Date | July 24, 2026 | July 31, 2026 |
| Parameters | — | 304B |
| Multimodal | Yes | No |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 128K | 393K |
| Input Price / 1M | $5.00 | $0.14 |
| Output Price / 1M | $25.00 | $0.28 |
| Average Score | 55.0% | 57.5% |
| Benchmarks | ||
| AutomationBench | 26.0% | 25.1% |
Visual Benchmark Comparison
Verdict
DeepSeek-V4-Flash-0731 leads in 1 out of 4 comparison categories.
Both models show comparable average scores: Claude Opus 5 — 0.5, DeepSeek-V4-Flash-0731 — 0.6.
DeepSeek-V4-Flash-0731 is 71.4x cheaper: input $0.14/1M vs $5.00/1M tokens.
Same context size: 1M tokens.
Both models were released around the same time: 7/24/2026 and 7/31/2026.
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Frequently Asked Questions
Which is better for coding — Claude Opus 5 or DeepSeek-V4-Flash-0731?
Which model is cheaper — Claude Opus 5 or DeepSeek-V4-Flash-0731?
Which has a larger context window — Claude Opus 5 or DeepSeek-V4-Flash-0731?
The Claude Opus 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 Opus 5 or DeepSeek-V4-Flash-0731 page. See also the complete list of AI model comparisons.