Claude Haiku 4.5vsDeepSeek-V4-Pro
Claude Haiku 4.5 | DeepSeek-V4-Pro | |
|---|---|---|
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 77%Best | 14% |
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 73.3% | — |
Competitive coding LiveCodeBenchCoding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. | — | 93.5% |
Web browsing BrowseCompCan the AI browse the web and track down hard-to-find answers? Higher is better. | — | 83.4% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 73% | 90.1%Best |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1457 |
| Timeline | ||
| Release gap | Claude Haiku 4.5 shipped 191 days before DeepSeek-V4-Pro | |
| Overview | ||
| Company | Anthropic | DeepSeek |
| Release date | Oct 15 2025 | Apr 24 2026 |
| Access | Proprietary | Open Weight |
Which is better: Claude Haiku 4.5 or DeepSeek-V4-Pro?
Claude Haiku 4.5 and DeepSeek-V4-Pro are evenly matched across the 2 benchmarks they both report (BullshitBench v2, GPQA Diamond). Claude Haiku 4.5 shipped 191 days before DeepSeek-V4-Pro, so benchmark comparisons should account for the intervening progress.
Claude Haiku 4.5 is proprietary, while DeepSeek-V4-Pro is open weight.
On BullshitBench v2, Claude Haiku 4.5 leads at 77% vs DeepSeek-V4-Pro at 14%. On GPQA Diamond, DeepSeek-V4-Pro leads at 90.1% vs Claude Haiku 4.5 at 73%.
Frequently asked questions
Claude Haiku 4.5 was released by Anthropic on Oct 15 2025.
DeepSeek-V4-Pro was released by DeepSeek on Apr 24 2026.
DeepSeek-V4-Pro leads on GPQA Diamond — Claude Haiku 4.5 73% vs DeepSeek-V4-Pro 90.1%.
Claude Haiku 4.5 is a proprietary model released by Anthropic. DeepSeek-V4-Pro is an open weight model released by DeepSeek.