Compare AI models
| API pricingUSD per 1M tokens · lower wins | ||
Cheapest inputLowest input rate across every provider on OpenRouter, the lab included. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | — | $0.50DeepInfra |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | — | $2.15DeepInfra |
| — | $208DeepInfra · fp4 | |
| 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. | 34% | 8% |
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. | 72.5% | — |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 79.6% | — |
| Overview | ||
| Company | Anthropic | DeepSeek |
| Release date | May 22 2025 | May 28 2025 |
| Access | Closed | Open Weight |
| Model details | View model | View model |
Other comparisons
Claude Opus 4vsGPT-6.1 SolDeepSeek R1-0528vsGPT-6.1 SolClaude Opus 4vsGemini 4 ArgonDeepSeek R1-0528vsGemini 4 ArgonClaude Opus 4vsMuse WonderDeepSeek R1-0528vsMuse WonderClaude Opus 4vsGrok 4.7DeepSeek R1-0528vsGrok 4.7Claude Opus 4vsMistral Large 4DeepSeek R1-0528vsMistral Large 4Claude Opus 4vsKimi K3DeepSeek R1-0528vsKimi K3Frequently asked questions
Claude Opus 4 leads DeepSeek R1-0528 on 1 of the 1 benchmark they both report (BullshitBench v2). Claude Opus 4 shipped 6 days before DeepSeek R1-0528, so benchmark comparisons should account for the intervening progress.
Claude Opus 4 is closed, while DeepSeek R1-0528 is open weight.
On BullshitBench v2, Claude Opus 4 leads at 34% vs DeepSeek R1-0528 at 8%.