# GLM-5.2 vs Seed 2.1 Pro

> Side-by-side benchmark comparison for GLM-5.2 and Seed 2.1 Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/glm-5-2-vs-seed-2-1-pro
- Last updated: September 10, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: GLM-5.2 and Seed 2.1 Pro 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.
- Seed 2.1 Pro has the lower published output-token price.
- GLM-5.2 has the larger published context window at 1M.

## Model Snapshot

| Property | GLM-5.2 | Seed 2.1 Pro |
|----------|----------|----------|
| Creator | Z.AI | ByteDance |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 256K |
| Independent public score (not head-to-head) | 68.12 | null |
| Benchmarks Covered | 25 | 11 |
| Pricing (input/output) | $1.40 / $4.40 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GLM-5.2 public-lane score: 58.5 (Supported · #28/152)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | GLM-5.2 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 4.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 81% | Coming soon | Coming soon |
| MCP Atlas | 76.8% | Coming soon | Coming soon |
| Toolathlon | 48.2% | Coming soon | Coming soon |
| ResearchClawBench | 20.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 67.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 71.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GLM-5.2 public-lane score: 61 (Supported · #19/151)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | GLM-5.2 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 62.1% | Coming soon | Coming soon |
| NL2Repo | 48.9% | 47% | GLM-5.2 |
| Terminal-Bench 2.0 | 81.0% | Coming soon | Coming soon |
| ProgramBench | 63.7% | Coming soon | Coming soon |
| cursorBench32 | 55.0% | Coming soon | Coming soon |
| OpenHarmony Bench | 58.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 69.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 82.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 71.0% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GLM-5.2 public-lane score: Coming soon
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | GLM-5.2 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| MathVision | Coming soon | 92.6% | Coming soon |
| MMMU-Pro | Coming soon | 81.6% | Coming soon |
| ZeroBench | Coming soon | 18.0% | Coming soon |
| BabyVision | Coming soon | 73.7% | Coming soon |
| CharXiv | Coming soon | 85.4% | Coming soon |
| ERQA | Coming soon | 72.0% | Coming soon |
| Video-MME | Coming soon | 89.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GLM-5.2 public-lane score: 74.8 (Unranked · 2 rankable rows)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | GLM-5.2 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| CritPt | 20.9% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GLM-5.2 public-lane score: 60.7 (Supported · #35/183)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | GLM-5.2 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 91.2% | Coming soon | Coming soon |
| GPQA-D | 91.2% | Coming soon | Coming soon |
| HLE | 54.7% | Coming soon | Coming soon |
| HLE w/o tools | 40.5% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 85.6% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 86.7% | Coming soon | Coming soon |
| SuperGPQA | Coming soon | 70.8% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GLM-5.2 public-lane score: 89.8 (#22/123)
- Seed 2.1 Pro public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- GLM-5.2 public-lane score: 80.7 (Unranked · 4 rankable rows)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | GLM-5.2 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 99.2% | Coming soon | Coming soon |
| HMMT Nov 2025 | 94.4% | Coming soon | Coming soon |
| HMMT Feb 2026 | 92.5% | Coming soon | Coming soon |
| MMAnswerBench | 91.0% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GLM-5.2 and Seed 2.1 Pro?

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-5.2 vs GLM-5.3](/compare/glm-5-2-vs-glm-5-3)
- [Seed 2.1 Pro vs GLM-5.3](/compare/glm-5-3-vs-seed-2-1-pro)
- [GLM-5.2 vs GLM-5.3-Flash](/compare/glm-5-2-vs-glm-5-3-flash)
- [Seed 2.1 Pro vs GLM-5.3-Flash](/compare/glm-5-3-flash-vs-seed-2-1-pro)

## Explore More

- [GLM-5.2 profile](/models/glm-5-2)
- [Seed 2.1 Pro profile](/models/seed-2-1-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)