Grok 4.1 Fast
SpaceXAI
43.2#218 of 427 overall
- Input / output
- free / free US$ per 1M tokens
- Context
- — tokens
- Release
- 11/19/2025 release date
- Weights
- Closed
- Speed
- 0 tok/s first token in 0.00 s
Family history
The 2 versions of this family, from first to newest, by release date. Click a point to open that version.
See the data as a table
| Model | Released | Score | Rank | Elo Arena |
|---|---|---|---|---|
| Grok 4 Fast | 09/19/2025 | 42.9 | #225 | 1407 |
| Grok 4.1 Fast | 11/19/2025 | 43.2 | #218 | 1408 |
Scores by source
Scores by sourcepercentile = % of ranked models it beats| Metric | Value | Percentile | Source |
|---|---|---|---|
| Arena text (Elo) weight 2 | 1408 | 49% | LMArena |
| Arena WebDev (Elo) weight 1 | 1242 | 8% | LMArena |
| Arena vision (Elo) weight 0.5 | 1201 | 30% | LMArena |
| Humanity's Last Exam weight 1 | 19.3 | 68% | Artificial Analysis |
| GPQA Diamond | 85.3 | 78% | Artificial Analysis |
| Long-context reasoning | 74.0 | 71% | Artificial Analysis |
By category
| Category | Score | Rank | Metrics |
|---|---|---|---|
| Coding | 28.9 | #110 | Arena WebDev (Elo) |
| Reasoning | 65.2 | #109 | Humanity's Last Exam, GPQA Diamond |
| Research | 60.7 | #94 | Long-context reasoning |
| Design | 28.9 | #109 | Arena WebDev (Elo) |
| Chat | 49.4 | #101 | Arena text (Elo) |
| Vision | 39.8 | #75 | Arena vision (Elo) |
History
RankingIA score on each collection day (hover to see the rank).
Daily collection started on 10/30/2026. The chart appears from the second day the model is ranked.