DeepSeek V4.1-Flash-1017 vs. Claude Haiku 5.5: More accurate at a fraction of the price
DeepSeek's October 17 V4.1-Flash-1017 update scored 42.3 on Terminal-Bench 4.0, outperforming Anthropic's Claude Haiku 5.5 (39.2 points). The comparison is based on vendor-reported benchmarks and real API pricing tests through OpenRouter. DeepSeek offers lower costs on longer prompts, while Claude Haiku is cheaper for short prompts. Both models are positioned for high-volume tasks, though neither vendor directly compared their newest versions before this review.
Key points
- DeepSeek V4.1-Flash-1017 scores higher (42.3 vs 39.2 on Terminal-Bench)
- DeepSeek cheaper for long prompts; Haiku better for short prompts
- Both designed for high-volume classification and summarization tasks
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