# GLM-5.1 vs Step 5 Preview

> Side-by-side benchmark comparison for GLM-5.1 and Step 5 Preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/glm-5-1-vs-step-5-preview
- Last updated: September 21, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Step 5 Preview if you want the stronger benchmark profile. GLM-5.1 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Step 5 Preview leads overall 72 to 63.31.
- The clearest category separation is in reasoning, where the averages are 71.7 for GLM-5.1 and 78.5 for Step 5 Preview.
- The biggest single benchmark swing is BrowseComp in Agentic, with scores of 68% and 88.7%.
- Step 5 Preview is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Step 5 Preview also has the larger context window at 1M.

## Model Snapshot

| Property | GLM-5.1 | Step 5 Preview |
|----------|----------|----------|
| Creator | Z.AI | StepFun |
| Type | Open Weight | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 203K | 1M |
| Overall Score | 63.31 | null |
| Benchmarks Covered | 26 | 22 |
| Pricing (input/output) | $1.40 / $4.40 | $1.00 / $2.70 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- GLM-5.1 public-lane score: 54.5 (Estimated · #37/154)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | GLM-5.1 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 63.5% | Coming soon | Coming soon |
| BrowseComp | 68% | 88.7% | Step 5 Preview |
| τ³-bench results | 70.6% | Coming soon | Coming soon |
| MCP Atlas | 71.8% | 85.6% | Step 5 Preview |
| CyberGym | 68.7% | 84.7% | Step 5 Preview |
| Claw-Eval | 62.3% | Coming soon | Coming soon |
| Gert Labs | 60.11% | Coming soon | Coming soon |
| ResearchClawBench | 18.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 56.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 85.0% | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 33.30% | Coming soon |
| AutomationBench | Coming soon | 44.0% | Coming soon |
| Toolathlon-Verified | Coming soon | 74.1% | Coming soon |
| JobBench | Coming soon | 59.0% | Coming soon |
| APEX-Agents | Coming soon | 37.8% | Coming soon |
| DRACO | Coming soon | 83.3% | Coming soon |
| Agents' Last Exam | Coming soon | 29.5% | Coming soon |

### Coding

- Winner: Coming soon
- GLM-5.1 public-lane score: 56.8 (Supported · #36/156)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | GLM-5.1 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 58.4% | Coming soon | Coming soon |
| NL2Repo | 42.7% | Coming soon | Coming soon |
| SWE-Rebench | 62.7% | Coming soon | Coming soon |
| Vibe Code Bench | 31.46% | Coming soon | Coming soon |
| OpenHarmony Bench | 52.3% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 81.4% | Coming soon | Coming soon |
| SWE-bench (Vals) | 76.4% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 67.7% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 85.0% | Coming soon |
| SciCode | Coming soon | 58.9% | Coming soon |
| ProgramBench | Coming soon | 80.5% | Coming soon |
| sweMarathon | Coming soon | 72.7% | Coming soon |
| MLS-Bench Lite | Coming soon | 40.5% | Coming soon |

### Reasoning

- Winner: Coming soon
- GLM-5.1 public-lane score: 71.7 (Unranked · 2 rankable rows)
- Step 5 Preview public-lane score: 78.5 (Unranked · 2 rankable rows)

| Benchmark | GLM-5.1 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 20.9% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- GLM-5.1 public-lane score: Coming soon
- Step 5 Preview public-lane score: 61.2 (#28/49)

| Benchmark | GLM-5.1 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 60.3% | Coming soon |
| MMMU-Pro | Coming soon | 76% | Coming soon |

### Knowledge

- Winner: Coming soon
- GLM-5.1 public-lane score: 54.9 (Supported · #54/186)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | GLM-5.1 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 86.2% | 93.5% | Step 5 Preview |
| HLE | 52.3% | 46.5% | GLM-5.1 |
| GPQA Diamond (Vals) | 84.5% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 86.9% | Coming soon | Coming soon |

### Instruction Following

- Winner: Coming soon
- GLM-5.1 public-lane score: 92.4 (#4/124)
- Step 5 Preview public-lane score: Coming soon

### Mathematics

- Winner: Coming soon
- GLM-5.1 public-lane score: 63.8 (#3/7)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | GLM-5.1 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.3% | Coming soon | Coming soon |
| HMMT Nov 2025 | 94.0% | Coming soon | Coming soon |
| HMMT Feb 2026 | 82.6% | Coming soon | Coming soon |
| MMAnswerBench | 83.8% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 33.448% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 12.500% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GLM-5.1 or Step 5 Preview?

Step 5 Preview is ahead overall on BenchLM right now.

### Where is the biggest gap between GLM-5.1 and Step 5 Preview?

The widest category gap is in reasoning, where the averages are 71.7 for GLM-5.1 and 78.5 for Step 5 Preview.

### How many benchmarks does GLM-5.1 cover on BenchLM?

GLM-5.1 currently has 26 sourced benchmark scores on BenchLM.

### How many benchmarks does Step 5 Preview cover on BenchLM?

Step 5 Preview currently has 22 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GLM-5.1 vs GLM-5.3](/compare/glm-5-1-vs-glm-5-3)
- [Step 5 Preview vs GLM-5.3](/compare/glm-5-3-vs-step-5-preview)
- [GLM-5.1 vs GLM-5.2](/compare/glm-5-1-vs-glm-5-2)
- [Step 5 Preview vs GLM-5.2](/compare/glm-5-2-vs-step-5-preview)

## Explore More

- [GLM-5.1 profile](/models/glm-5-1)
- [Step 5 Preview profile](/models/step-5-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)