Compare AI models
| API pricingUSD per 1M tokens · lower wins | ||
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. | $0.50DeepInfra | — |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $2.15DeepInfra | — |
| 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. | 8% | 19% |
| Overview | ||
| Company | DeepSeek | SpaceXAI |
| Release date | May 28 2025 | Nov 19 2025 |
| Access | Open Weight | Closed |
| Model details | View model | View model |
Other comparisons
DeepSeek R1-0528vsClaude Sonnet 5.5Grok 4.1 FastvsClaude Sonnet 5.5DeepSeek R1-0528vsGPT-6.1 SolGrok 4.1 FastvsGPT-6.1 SolDeepSeek R1-0528vsGemini 4 ArgonGrok 4.1 FastvsGemini 4 ArgonDeepSeek R1-0528vsMuse Spark 1.3Grok 4.1 FastvsMuse Spark 1.3DeepSeek R1-0528vsMistral Large 4Grok 4.1 FastvsMistral Large 4DeepSeek R1-0528vsKimi K3Grok 4.1 FastvsKimi K3Frequently asked questions
Grok 4.1 Fast leads DeepSeek R1-0528 on 1 of the 1 benchmark they both report (BullshitBench v2). DeepSeek R1-0528 shipped 175 days before Grok 4.1 Fast, so benchmark comparisons should account for the intervening progress.
DeepSeek R1-0528 is open weight, while Grok 4.1 Fast is closed.
On BullshitBench v2, Grok 4.1 Fast leads at 19% vs DeepSeek R1-0528 at 8%.