Updated 5 h ago · first seen 11 Sept 2026
model_01M29A5C6JX10E7G2PJY1PBHXT
- Context
- 2M tokens
- T2 · 5 h ago
Specification
- Status
- deprecated
Source:Artificial AnalysisT2observed 5 h agomedium
- Openness
- proprietary
Source:Artificial AnalysisT2observed 5 h agomedium
- Context window
- 2M tokens
Source:Artificial AnalysisT2observed 5 h agomedium
Each value shows its source, tier and observation time. Conflicting claims are kept side by side and flagged — never averaged. How AI Atlas records facts →
Provenance
Attributed facts
4
Source tiers
T24
Freshest observation
5 h ago
Conflicts
None
Modalities
Modalities unavailable.
Capabilities
Tool calling
Unavailable
Structured output
Unavailable
Reasoning
Yes
Artificial Analysis · T2
Vision
Unavailable
Audio
Unavailable
Fine-tuning available
Unavailable
- Context window
- 2M tokens
Source:Artificial AnalysisT2observed 5 h agomedium
| Benchmark | Score | Metric | Config | Evaluated | Source |
|---|---|---|---|---|---|
| τ²-bench | 93.27% | pass^1 | aa_slug=grok-4-1-fast-reasoning · evaluator=Artificial Analysis · index_version=4.3 | — | artificialanalysis.aiT2 |
| Artificial Analysis Intelligence Index | 20.37 | index | aa_slug=grok-4-1-fast-reasoning · version=4.3 · estimated=true | — | artificialanalysis.aiT2 |
| GPQA | 85.25% | accuracy | aa_slug=grok-4-1-fast-reasoning · variant=GPQA Diamond · evaluator=Artificial Analysis · index_version=4.3 | — | artificialanalysis.aiT2 |
| Humanity's Last Exam | 19.32% | accuracy | aa_slug=grok-4-1-fast-reasoning · evaluator=Artificial Analysis · index_version=4.3 | — | artificialanalysis.aiT2 |
| IFBench | 52.72% | accuracy | aa_slug=grok-4-1-fast-reasoning · evaluator=Artificial Analysis · index_version=4.3 | — | artificialanalysis.aiT2 |
| MMMU-Pro | 63.29% | accuracy | aa_slug=grok-4-1-fast-reasoning · evaluator=Artificial Analysis · index_version=4.3 | — | artificialanalysis.aiT2 |
| Terminal-Bench | 24.24% | accuracy | aa_slug=grok-4-1-fast-reasoning · variant=hard · evaluator=Artificial Analysis · index_version=4.3 | — | artificialanalysis.aiT2 |
Scores are reported as published, with their evaluation configuration (harness, prompting, judge). Results with different configs are not directly comparable — see methodology.
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Price history
No hardware estimate available
No lineage recorded
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As of
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Claim history · Openness
Opennessopenness1
| Value | Valid from → to | Status | Source | Confidence | Extractor |
|---|---|---|---|---|---|
| proprietary | → current | current | Artificial AnalysisT2 | medium | deterministic |
Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →
New model: grok-4-1-fast-reasoning (SpaceXAI)
artificial_analysisgrok-4-1-fast-reasoning scores 24.24% on Terminal-Bench
artificial_analysisgrok-4-1-fast-reasoning scores 93.27% on τ²-bench
artificial_analysisgrok-4-1-fast-reasoning scores 63.29% on MMMU-Pro
artificial_analysisgrok-4-1-fast-reasoning scores 52.72% on IFBench
artificial_analysisgrok-4-1-fast-reasoning scores 19.32% on Humanity's Last Exam
artificial_analysisgrok-4-1-fast-reasoning scores 85.25% on GPQA
artificial_analysisgrok-4-1-fast-reasoning scores 20.37 on Artificial Analysis Intelligence Index
artificial_analysis
| Source | Document | Type | Tier | Last observed | Snapshots |
|---|---|---|---|---|---|
| Artificial Analysis | artificialanalysis.ai/leaderboards/models | leaderboard | T2· Quality secondary | 5 h ago | 1 |
Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.