# GLM-4.6 vs GPT-5.1-Codex

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

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

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: GLM-4.6 and GPT-5.1-Codex 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.
- GPT-5.1-Codex has the larger published context window at 400K.

## Model Snapshot

| Property | GLM-4.6 | GPT-5.1-Codex |
|----------|----------|----------|
| Creator | Z.AI | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 400K |
| Independent public score (not head-to-head) | 53.94 | 51.62 |
| Benchmarks Covered | 3 | 3 |
| Pricing (input/output) | N/A | $1.25 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GLM-4.6 public-lane score: Coming soon
- GPT-5.1-Codex public-lane score: 51.4 (Estimated · #54/151)

| Benchmark | GLM-4.6 | GPT-5.1-Codex | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | Coming soon | 49.68% | Coming soon |
| JobBench | Coming soon | 26.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GLM-4.6 public-lane score: 48.8 (Estimated · #84/183)
- GPT-5.1-Codex public-lane score: 47.4 (Estimated · #89/183)

| Benchmark | GLM-4.6 | GPT-5.1-Codex | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 3.09% | 13.12% | GPT-5.1-Codex |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GLM-4.6 public-lane score: Coming soon
- GPT-5.1-Codex public-lane score: 66.8 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- GLM-4.6 public-lane score: 41.4 (Unranked · 2 rankable rows)
- GPT-5.1-Codex public-lane score: 70.6 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- GLM-4.6 public-lane score: 45.3 (Estimated · #115/181)
- GPT-5.1-Codex public-lane score: 53.3 (Estimated · #69/181)

### Instruction Following

- Winner: Insufficient shared evidence
- GLM-4.6 public-lane score: 42.1 (#98/120)
- GPT-5.1-Codex public-lane score: 85.3 (#42/120)

### Mathematics

- Winner: Insufficient shared evidence
- GLM-4.6 public-lane score: 27.5 (Unranked · 2 rankable rows)
- GPT-5.1-Codex public-lane score: Coming soon

| Benchmark | GLM-4.6 | GPT-5.1-Codex | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 3.819% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 2.128% | Coming soon | Coming soon |

## FAQ

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

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

- [GLM-4.6 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-glm-4-6)
- [GPT-5.1-Codex vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-5-1-codex)
- [GLM-4.6 vs GPT-6 Astra](/compare/glm-4-6-vs-gpt-6-astra)
- [GPT-5.1-Codex vs GPT-6 Astra](/compare/gpt-5-1-codex-vs-gpt-6-astra)

## Explore More

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