# GPT-5.1-Codex-Max vs Grok 4.6

> Side-by-side benchmark comparison for GPT-5.1-Codex-Max and Grok 4.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-1-codex-max-vs-grok-4-6
- Last updated: September 25, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.1-Codex-Max and Grok 4.6 share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Grok 4.6 has the lower published output-token price.
- Grok 4.6 has the larger published context window at 500K.

## Model Snapshot

| Property | GPT-5.1-Codex-Max | Grok 4.6 |
|----------|----------|----------|
| Creator | OpenAI | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 500K |
| Independent public score (not head-to-head) | null | 69.19 |
| Benchmarks Covered | 2 | 17 |
| Pricing (input/output) | $1.25 / $10.00 | $2.00 / $6.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.1-Codex-Max public-lane score: Coming soon
- Grok 4.6 public-lane score: 67.9 (Supported · #8/105)

| Benchmark | GPT-5.1-Codex-Max | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | Coming soon | 26.5% | Coming soon |
| APEX-Agents | Coming soon | 57.5% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 78.3% | Coming soon |
| ApprenticeBench | Coming soon | 13% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.1-Codex-Max public-lane score: Coming soon
- Grok 4.6 public-lane score: 62 (Supported · #14/135)

| Benchmark | GPT-5.1-Codex-Max | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 22.17% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 83.6% | 88.2% | Grok 4.6 |
| Bug Hunt Bench | Coming soon | 27 fixes | Coming soon |
| DeepSWE | Coming soon | 65.9% | Coming soon |
| cursorBench32 | Coming soon | 70.8% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 61.3% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| FrontierSWE v2 | Coming soon | 25.3% | Coming soon |
| SWE-bench (Vals) | Coming soon | 95.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.1-Codex-Max public-lane score: Coming soon
- Grok 4.6 public-lane score: 57.6 (#16/19)

| Benchmark | GPT-5.1-Codex-Max | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | Coming soon | 87.00% | Coming soon |
| ARC-AGI-2 | Coming soon | 67.1% | Coming soon |
| ARC-AGI-3 | Coming soon | 2.1% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.1-Codex-Max public-lane score: Coming soon
- Grok 4.6 public-lane score: 69 (Supported · #13/158)

| Benchmark | GPT-5.1-Codex-Max | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 94.7% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 89.4% | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.1-Codex-Max and Grok 4.6?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [GPT-5.1-Codex-Max vs GPT-6 Astra](/compare/gpt-5-1-codex-max-vs-gpt-6-astra)
- [Grok 4.6 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-6)
- [GPT-5.1-Codex-Max vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gpt-5-1-codex-max)
- [Grok 4.6 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-6)

## Explore More

- [GPT-5.1-Codex-Max profile](/models/gpt-5-1-codex-max)
- [Grok 4.6 profile](/models/grok-4-6)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)