grok-4-1-fast-reasoning: benchmark scores, price and ranking
grok-4-1-fast-reasoning from xAI ranks #490 of 743 LLMs on the LLMs Tiger aggregate benchmark score (46.7), based on 6 benchmark results captured up to 2026-10-13.
- Organisation
- xAI
- Type
- Frontier model
- Open weights
- No
- Cheapest API price
- $0.200 in / $0.500 out per million tokens (via azure_ai, observed 2026-10-13T20:47Z)
- Aggregate rank
- #490 of 743 (score 46.7)
Relative to other models, grok-4-1-fast-reasoning is strongest on DTBench (#32 of 146) and weakest on WebDev Arena (#63 of 67).
Across the 6 benchmarks where at least ten models are scored, grok-4-1-fast-reasoning is in the top 10% on 0 and in the top half on 2.
Its cheapest listed input price, $0.200 per million tokens, is lower than that of 67% of the 427 models with a listed price.
grok-4-1-fast-reasoning benchmark results
| Benchmark | Score | Rank | Source | Captured |
|---|---|---|---|---|
| DTBench | 87.7% | #32 of 146 | Epoch AI Benchmarking Hub | 2026-10-13 |
| SimpleBench | 56.0% | #14 of 61 | Epoch AI Benchmarking Hub | 2026-10-13 |
| Vending-Bench 2 | $1,107 | #13 of 19 | Epoch AI Benchmarking Hub | 2026-10-13 |
| ALE-Bench | 395 | #64 of 79 | Epoch AI Benchmarking Hub | 2026-10-13 |
| ProofBench | 4.0% | #41 of 46 | Epoch AI Benchmarking Hub | 2026-10-13 |
| WebDev Arena | 1,223 | #63 of 67 | Epoch AI Benchmarking Hub | 2026-10-13 |
About grok-4-1-fast-reasoning
grok-4-1-fast-reasoning is a frontier model from xAI. The cheapest API listing we track charges $0.200 per million input tokens and $0.500 per million output tokens, through azure_ai. We hold 6 benchmark results for it across 4 areas, and none is in the top tenth of its board.
Where grok-4-1-fast-reasoning stands
On our aggregate score, grok-4-1-fast-reasoning is #490 of 743 ranked models, in the lower half. Its score is 46.7; the scale is centred on 50, so it sits 3.3 points below the typical model. That beats 34% of the ranked field. Among the 26 ranked xAI models it is #22. The next one up is grok-4-1 at 47.5. The next one down is grok-3 at 46.5.
grok-4-1-fast-reasoning, benchmark by benchmark
DTBench puts grok-4-1-fast-reasoning at 87.7%, #32 of 146. That beats 78% of the models tested, but 11.2 points short of Claude Opus 5.5 (max) (98.9%). The results either side are GPT-5.6 Luna (max) (88.8%) and Inkling (xhigh) (87.5%). It covers dynamic tool-use benchmark. The board median is 68.8%, so grok-4-1-fast-reasoning is 18.9 points above it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
On SimpleBench, grok-4-1-fast-reasoning reaches 56.0%. It ranks #14 of 61, ahead of 77% of the field, and 25.9 points behind Claude Fable 5 (max) at 81.9%. The results either side are grok-4-1-fast-non-reasoning (56.0%) and GLM-5.1 (55.1%). It covers trick questions that test common sense. The board median is 41.4%, so grok-4-1-fast-reasoning is 14.6 points above it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
grok-4-1-fast-reasoning lands below the middle on Vending-Bench 2: $1,107, #13 of 19, with 63% of the field scoring higher. Kimi K2.6 leads at $6,205; the closest result above is Kimi K2.5 at $1,198. It covers running a vending business for a year (final money, $). The board median is $2,377, so grok-4-1-fast-reasoning is 1,270 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
ALE-Bench is a weak spot. grok-4-1-fast-reasoning scores 395, #64 of 79, behind 80% of the models measured. The leader, GPT-6 Astra (max), reaches 2,951. It covers AtCoder heuristic-optimisation contests (performance rating). The board median is 764, so grok-4-1-fast-reasoning is 369 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
ProofBench is a weak spot. grok-4-1-fast-reasoning scores 4.0%, #41 of 46, behind 87% of the models measured. The leader, Claude Fable 5.1 (max), reaches 100.0%. It covers writing mathematical proofs. The board median is 21.0%, so grok-4-1-fast-reasoning is 17.0 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
WebDev Arena is a weak spot. grok-4-1-fast-reasoning scores 1,223, #63 of 67, behind 93% of the models measured. The leader, Claude Opus 5.5 (max), reaches 1,820. It covers building web apps, crowd-voted (Elo). The board median is 1,433, so grok-4-1-fast-reasoning is 210 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
Strengths and weaknesses
Software engineering: weak, ahead of 12% of the field on average across 2 benchmarks. Its best board here is ALE-Bench (#64 of 79) and its weakest is WebDev Arena (#63 of 67). Reasoning, maths and science: uneven, ahead of 44% of the field on average across 2 benchmarks. Its best board here is SimpleBench (#14 of 61) and its weakest is ProofBench (#41 of 46).
Price and value
The median input price across the 427 priced models is $0.500 per million tokens, so grok-4-1-fast-reasoning costs less than the typical listing. Models that score within 1.5 points or better and cost less: Qwen2.5-Coder-7B-Instruct ($0.010, 49.5), DeepSeek V4.1 Flash (high) ($0.010, 48.9), Qwen2.5-Coder-3B-Instruct ($0.010, 46.5). Similar scores cost more on MiniMax-M3 ($0.230) and DeepSeek-V3.1 ($0.250).
Reading these numbers
The 6 scores on this page come from 1 source: Epoch AI Benchmarking Hub (6). No official leaderboard supplied any of them, so treat them as third-party measurements. With 6 results the aggregate rank can move a lot when one new score arrives.
Models ranked nearby
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- #488 Gemini 2.0 Pro Exp (Feb 2025) (46.7)
- #489 mistral-medium-2312 (46.7)
- #491 Llama 4 Maverick Instruct (46.7)
- #492 internlm2-chat-20b (46.7)
- #493 mistral-small-2402 (46.7)
More from xAI
- Grok 4.6 (xhigh) (#34, 53.6)
- grok-4-0709 (#38, 53.2)
- Grok 4 (#39, 53.2)
- Grok 4.7 (xhigh) (#41, 53.1)
- Grok 4.5 (high) (#85, 52.0)
- Grok 4.20 (Reasoning) (#136, 51.2)
Compare it on the live leaderboard → · How the aggregate score works