Model comparison
Claude Haiku 5.5 vs GLM-5.1
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 47.8 on the Noometry Index.
Last verified . 6 shared benchmarks.
Summary
- They share 6 benchmarks with published results for both. Claude Haiku 5.5 scores higher in 2 categories and GLM-5.1 in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 49.7.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 75.1% for Claude Haiku 5.5 and 36.8% for GLM-5.1.
- Claude Haiku 5.5 is cheaper at $0.10 / $0.50 per million input/output tokens, against $1.40 / $4.40 for GLM-5.1.
- Claude Haiku 5.5 accepts more context: 1M tokens versus 200K.
- GLM-5.1 has downloadable open weights; the other is API-only.
Side by side
| Claude Haiku 5.5 | GLM-5.1 | |
|---|---|---|
| Provider | Anthropic | Z.ai (Zhipu) |
| Noometry Index | 49.5 | 47.8 |
| Released | 2026-10-07 | 2026-04-07 |
| Weights | Proprietary | Open |
| Context window | 1M | 200K |
| Max output | 128K | 131K |
| Input $ / M tokens | $0.10 | $1.40 |
| Output $ / M tokens | $0.50 | $4.40 |
| Results tracked | 9 | 41 |
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Category by category
Coding Too close to call
Claude Haiku 5.5: 49.2 (#50), GLM-5.1: 48.7 (#55)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| LMArena WebDev | 1587 | 1508 |
| SWE-bench Verified | — | 74.2% |
| SciCode | — | 43.8% |
| WeirdML | — | 57.1% |
| LMArena Coding | — | 1485 |
| ALE-Bench | — | 887.1 |
Agentic & Tool Use Not comparable
Claude Haiku 5.5: —, GLM-5.1: 24.9 (#113)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| APEX-Agents | — | 40.9% |
| ExploitBench | — | 18.1% |
| GBAEval | — | 0% |
| Vending-Bench 2 | — | 5,634 |
Reasoning GLM-5.1 leads
Claude Haiku 5.5: 35.2 (#69), GLM-5.1: 39.1 (#60)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| NYT Connections (extended) | 65.7% | 77.7% |
| SimpleBench | — | 55.1% |
| CritPt | — | 4.6% |
| Chess Puzzles | — | 19% |
| Thematic Generalization | — | 69.8% |
| LMArena Hard Prompts | — | 1472 |
| Mystery Game Puzzles | 30% | — |
| Epoch Capabilities Index | — | 149.84 |
Math Claude Haiku 5.5 leads
Claude Haiku 5.5: 73.6 (#18), GLM-5.1: 49.7 (#60)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 75.1% | 36.8% |
| OTIS Mock AIME 2024-2025 | 98.9% | 93.3% |
| FrontierMath Tier 4 | 46.3% | — |
| MathArena Final-Answer Competitions | — | 67.1% |
| ProofBench | — | 22.2% |
| LMArena Math | — | 1473 |
| FrontierMath (Feb 2025 set) | — | 33.4% |
| FrontierMath Tier 4 (v1) | — | 12.5% |
Knowledge GLM-5.1 leads
Claude Haiku 5.5: 50.8 (#70), GLM-5.1: 54.9 (#50)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| GPQA Diamond | 89.6% | 89.9% |
| SimpleQA Verified | 23.8% | 34% |
| LMArena Expert | — | 1476 |
Multimodal Not comparable
Claude Haiku 5.5: 43.7 (#21), GLM-5.1: —
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| Furniture Assembly | 47.5% | — |
Multilingual Not comparable
Claude Haiku 5.5: —, GLM-5.1: 55.0 (#36)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| LMArena Non-English | — | 1447 |
| LMArena Chinese | — | 1515 |
| LMArena French | — | 1474 |
| LMArena German | — | 1465 |
| LMArena Japanese | — | 1434 |
| LMArena Korean | — | 1418 |
| LMArena Russian | — | 1454 |
| LMArena Spanish | — | 1469 |
Instruction Following Not comparable
Claude Haiku 5.5: —, GLM-5.1: 76.3 (#42)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| LMArena Instruction Following | — | 1451 |
Long Context Not comparable
Claude Haiku 5.5: —, GLM-5.1: 44.9 (#53)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| LMArena Longer Query | — | 1466 |
Writing & Preference Not comparable
Claude Haiku 5.5: —, GLM-5.1: 66.9 (#31)
| Benchmark | Claude Haiku 5.5 | GLM-5.1 |
|---|---|---|
| LMArena Text | — | 1461 |
| LMArena Creative Writing | — | 1453 |
| EQ-Bench Creative Writing | — | 1592 |
| LMArena Multi-Turn | — | 1472 |
Frequently asked questions
Is Claude Haiku 5.5 better than GLM-5.1?
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 47.8 on the Noometry Index.
Which is cheaper, Claude Haiku 5.5 or GLM-5.1?
Claude Haiku 5.5 is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; GLM-5.1 lists at $1.40 and $4.40.
Is Claude Haiku 5.5 or GLM-5.1 better for coding?
They score almost the same on coding (49.2 vs 48.7); test both on your own repository before choosing.
Which has the bigger context window?
Claude Haiku 5.5 does, with 1M tokens against 200K.
How many benchmarks do Claude Haiku 5.5 and GLM-5.1 share?
6 benchmarks have published results for both models. Claude Haiku 5.5 has 9 scored results on Noometry and GLM-5.1 has 41.