Claude Haiku 4.5vsDeepSeek-V4-Flash-0731
Claude Haiku 4.5 | DeepSeek-V4-Flash-0731 | |
|---|---|---|
| API pricingUSD per 1M tokens · lower wins · base tier | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $1.00 | $0.22 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | $5.00 | $0.66 |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | $0.10 | $0.007 |
Cheapest inputLowest input rate across third-party providers, excluding the lab itself. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $1.00Amazon Bedrock | $0.04OpenInference |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $5.00Amazon Bedrock | $0.10OpenInference |
| Benchmarks | ||
BullshitBench v2Nonsense detection — Given 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% | 39% |
SWE-Bench VerifiedCoding — Real 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% | 79% |
| BenchmarksPublished by one model only | ||
ProgramBenchProgram reconstruction — The AI receives a working program and its documentation, then builds a replacement from scratch without the original source code, internet access or decompilation. The score is the percentage of 200 programs that pass every behavioral test. We record each model's best published mini-SWE-agent result, including higher reasoning efforts where available. Partial test-pass rates and almost-solved programs do not count toward this score. Equal scores share a rank here; the official board also uses partial progress to break ties. Higher is better. | 0% | — |
Terminal-Bench 2.1Agentic terminal coding — Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | — | 82.7% |
Toolathlon-VerifiedPersonal tool use — Tests how well the AI uses everyday personal tools and apps to get things done — a human-checked version of Toolathlon. Higher is better. | — | 70.3% |
BrowseCompWeb browsing — Can the AI browse the web and track down hard-to-find answers? Higher is better. | — | 73.2% |
CyberGymCybersecurity — Tests the AI on cybersecurity challenges — finding and exploiting software weaknesses inside a safe sandbox. Higher is better. | — | 76.7% |
Humanity's Last Exam · with toolsMultidisciplinary reasoning — Humanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. | — | 34.8% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 73% | — |
AutomationBenchBusiness workflows — Tests whether the AI can run real multi-step business workflows — the kind of end-to-end office processes companies want to automate — from start to finish. Higher is better. | — | 25.1% |
| Overview | ||
| Company | Anthropic | DeepSeek |
| Release date | Oct 15 2025 | Jul 31 2026 |
| Access | Proprietary | Proprietary |
Other comparisons
Claude Haiku 4.5vsGPT-6 AstraDeepSeek-V4-Flash-0731vsGPT-6 AstraClaude Haiku 4.5vsGemini 3.8 FlashDeepSeek-V4-Flash-0731vsGemini 3.8 FlashClaude Haiku 4.5vsMuse Spark 1.3DeepSeek-V4-Flash-0731vsMuse Spark 1.3Claude Haiku 4.5vsGrok 4.6DeepSeek-V4-Flash-0731vsGrok 4.6Claude Haiku 4.5vsMistral Medium 3.5DeepSeek-V4-Flash-0731vsMistral Medium 3.5Claude Haiku 4.5vsKimi K3DeepSeek-V4-Flash-0731vsKimi K3
Frequently asked questions
Claude Haiku 4.5 and DeepSeek-V4-Flash-0731 are evenly matched across the 2 benchmarks they both report (BullshitBench v2, SWE-Bench Verified). DeepSeek-V4-Flash-0731 is cheaper on both input and output: $0.22 vs $1.00 per million input tokens, and $0.66 vs $5.00 per million output tokens. Figures are base-tier rates. Claude Haiku 4.5 shipped 289 days before DeepSeek-V4-Flash-0731, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On BullshitBench v2, Claude Haiku 4.5 leads at 77% vs DeepSeek-V4-Flash-0731 at 39%. On SWE-Bench Verified, DeepSeek-V4-Flash-0731 leads at 79% vs Claude Haiku 4.5 at 73.3%.