Updated October 20, 2026. Rank says Grok 4.1 Fast (Reasoning) is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.
Grok 4.1 Fast (Reasoning) has the higher public point estimate, 45.82 versus 43.46. Their conditional score ranges overlap. These ranges do not establish rank confidence. 1 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
No workload recommendation clears the current evidence threshold.
Use the matched evidence, workload costs, and sourced specifications below instead of treating a point score as a universal answer.
Code generation, repair, and software-engineering tasks
Not enough matched evidence
Grok 4.1 Fast (Reasoning) and Grok 4 Fast (Reasoning) are scored on Estimated evidence for coding, so the reading is directional rather than like-for-like.
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Grok 4.1 Fast (Reasoning) and Grok 4 Fast (Reasoning) are not ranked on the public lane for agentic, so no winner is named for agentic.
Prompts that approach the documented context limit
No clear pick
The documented context windows are equal.
1K fresh input + 500 output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
200K cached + 20K fresh input + 10K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
50K fresh input + 3K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Choose a job from the LLM Selector's task catalog to see the category row it rests on, under the same basis rules as the table below. A directional row stays directional; choosing a job never creates a winner.
The same task catalog as the LLM Selector. Each job names the evidence surface it rests on; nothing here adds a new score.
Directional only · BenchAlign v5.8
Grok 4.1 Fast (Reasoning) has the higher coding point estimate. Conditional score ranges do not establish rank confidence.
Coding scores combine specific tasks and setups. Match the editor, harness, and effort to your workflow.
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
3 categories rest on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
A shared-evidence shape is not available.
BenchLM does not draw a radar or infer missing axes when the matched evidence is too sparse.
Each row shows the public-lane category score for both models: the BenchAlign v5.8 lane for agentic, coding, and knowledge, and the weighted public rows elsewhere, with the same rank each model page reports. A row is like-for-like only when both scores rest on Supported evidence or the same weighted set. Directional and not-comparable rows remain visible, but they never receive a winner.
| Category | Grok 4.1 Fast (Reasoning) | Grok 4 Fast (Reasoning) | Basis | Reading |
|---|---|---|---|---|
| Coding | 24.8Estimated · #109/152 | 20.4Estimated · #122/152 | Directional onlyBenchAlign v5.8 lane · 1 vs 1 public rows | Directional only |
| Knowledge | 42.9Estimated · #110/187 | 40.8Estimated · #118/187 | Directional onlyBenchAlign v5.8 lane · 0 vs 0 public rows | Directional only |
| Instruction following | 63.0#81/149 | 60.1#82/149 | Directional onlyProvisional lane · 0 vs 0 weighted rows | Directional only |
| Agentic | Not ranked | Not ranked | Not comparableBenchAlign v5.8 lane · 0 vs 0 public rows | Not comparable |
| Reasoning | 75.8Unranked · 2 rankable rows | 75.6Unranked · 2 rankable rows | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multimodal | 57.8Unranked · 1 rankable row | 55.6Unranked · 1 rankable row | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Math | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign v5.8) differ from the provisional-lane categories. Unranked scores sit on the provisional lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
1K fresh input + 500 output tokens
Grok 4.1 Fast (Reasoning) has no comparable published API token rate. Grok 4 Fast (Reasoning) has no comparable published API token rate.
50K fresh input + 3K output tokens
Grok 4.1 Fast (Reasoning) has no comparable published API token rate. Grok 4 Fast (Reasoning) has no comparable published API token rate.
200K cached + 20K fresh input + 10K output tokens
Grok 4.1 Fast (Reasoning) has no comparable published API token rate. Grok 4 Fast (Reasoning) has no comparable published API token rate.
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
Maximum documented context; output-token limits may be lower.
Grok 4.1 Fast (Reasoning)
2M
Grok 4 Fast (Reasoning)
2M
Grok 4.1 Fast (Reasoning)
Not sourced
Grok 4 Fast (Reasoning)
Not sourced
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Grok 4.1 Fast (Reasoning)
No comparable hosted API rate
Grok 4 Fast (Reasoning)
No comparable hosted API rate
Grok 4.1 Fast (Reasoning)
Not sourced
Grok 4 Fast (Reasoning)
Not sourced
Grok 4.1 Fast (Reasoning)
Not sourced
Grok 4 Fast (Reasoning)
Not sourced
Grok 4.1 Fast (Reasoning)
Not sourced
Grok 4 Fast (Reasoning)
Not sourced
Grok 4.1 Fast (Reasoning)
Reasoning
Grok 4 Fast (Reasoning)
Reasoning
Grok 4.1 Fast (Reasoning)
Proprietary
Grok 4 Fast (Reasoning)
Proprietary
Grok 4.1 Fast (Reasoning)
Proprietary
Grok 4 Fast (Reasoning)
Proprietary
Grok 4.1 Fast (Reasoning)
2025-11-19
Grok 4 Fast (Reasoning)
2025-09-19
Grok 4.1 Fast (Reasoning) has the higher public point estimate, 45.82 versus 43.46. Their conditional score ranges overlap. These ranges do not establish rank confidence. The page therefore keeps the decision tied to the specific documented workload.
Grok 4.1 Fast (Reasoning) scores higher for coding on the public lane, 24.8 to 20.4. Grok 4.1 Fast (Reasoning) and Grok 4 Fast (Reasoning) are scored on Estimated evidence for coding, so the reading is directional rather than like-for-like. BenchLM does not name a winner for coding from a directional reading; read the shared benchmark rows directly and test the models on the same task set.
Grok 4.1 Fast (Reasoning) and Grok 4 Fast (Reasoning) are not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Both models do not have comparable published API token rates, so this page does not name a universal price winner.
Both models list the same context window, 2M.
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Vibe Code Bench
Shared sourceGrok 4.1 Fast (Reasoning) leads this result
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Last updated October 20, 2026
