Grok 4.1vsGrok Code Fast 1
Grok 4.1 | Grok Code Fast 1 | |
|---|---|---|
| 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 |
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. | — | $2.00 |
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. | — | $0.20 |
| Benchmarks | ||
Arena Elo (Code)Community preference (code) — Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | 1209 | 1163 |
| BenchmarksPublished by one model only | ||
Arena Elo (Text)Community preference — Real people chat with two anonymous AIs side by side and vote for the answer they prefer. Votes become a chess-style Elo rating on arena.ai — it measures which AI people actually like, not test scores. Higher is better. | 1466 | — |
| Overview | ||
| Company | SpaceXAI | SpaceXAI |
| Release date | Nov 17 2025 | Aug 28 2025 |
| Access | Proprietary | Proprietary |
Frequently asked questions
Grok 4.1 leads Grok Code Fast 1 on 1 of the 1 benchmark they both report (Arena Elo (Code)). Only Grok Code Fast 1 has a verified first-party API price: $1.00 per million input tokens and $2.00 per million output tokens. No pay-as-you-go API rate is tracked for Grok 4.1. Grok Code Fast 1 shipped 81 days before Grok 4.1, 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 Arena Elo (Code), Grok 4.1 leads at 1209 vs Grok Code Fast 1 at 1163.
Grok 4.1 was released by SpaceXAI on Nov 17 2025.
Grok Code Fast 1 was released by SpaceXAI on Aug 28 2025.
Only Grok Code Fast 1 has a verified first-party API price: $1.00 per million input tokens and $2.00 per million output tokens. No pay-as-you-go API rate is tracked for Grok 4.1. Rates are pay-as-you-go API prices verified on August 18, 2026.