Compare AI models
| 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. | $0.25 | $1.25 |
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. | $1.50 | $2.50 |
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. | $0.025 | $0.20 |
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. | $0.125Google | — |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $0.75Google | — |
| 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. | 11% | 56% |
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. | — | 76.7% |
ARC-AGI-2Abstract reasoning — Puzzle-style tests of abstract reasoning and pattern-finding — the kind of thing people find easy but AIs often struggle with. Higher is better. | — | 53.3% |
| Overview | ||
| Company | SpaceXAI | |
| Release date | Mar 3 2026 | Feb 17 2026 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Gemini 3.1 Flash-LitevsClaude Sonnet 5.5Grok 4.20 BetavsClaude Sonnet 5.5Gemini 3.1 Flash-LitevsGPT-6.1 SolGrok 4.20 BetavsGPT-6.1 SolGemini 3.1 Flash-LitevsMuse Spark 1.3Grok 4.20 BetavsMuse Spark 1.3Gemini 3.1 Flash-LitevsDeepSeek-V4.1-FlashGrok 4.20 BetavsDeepSeek-V4.1-FlashGemini 3.1 Flash-LitevsMistral Large 4Grok 4.20 BetavsMistral Large 4Gemini 3.1 Flash-LitevsKimi K3Grok 4.20 BetavsKimi K3Frequently asked questions
Grok 4.20 Beta leads Gemini 3.1 Flash-Lite on 1 of the 1 benchmark they both report (BullshitBench v2). Gemini 3.1 Flash-Lite is cheaper on both input and output: $0.25 vs $1.25 per million input tokens, and $1.50 vs $2.50 per million output tokens. Figures are base-tier rates. Grok 4.20 Beta shipped 14 days before Gemini 3.1 Flash-Lite, 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, Grok 4.20 Beta leads at 56% vs Gemini 3.1 Flash-Lite at 11%.