GLM 5 vs GLM 5.1
At a Glance
| Compare |  GLM 5Z.ai | GLM 5.1Z.ai |
|---|---|---|
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $0.60Deepinfra ↗ · Sep 3, 2026 | $1.05Deepinfra ↗ · Sep 24, 2026 |
| Output priceFrom · USD / 1M tokens | $1.92Openrouter ↗ · Aug 28, 2026 | $3.50Deepinfra ↗ · Sep 24, 2026 |
| Context windowMaximum documented tokens | 203K | 203K |
| Model facts checked | Aug 28, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | GLM-5 | GLM-5.1 |
|---|---|---|
| LMArena Text Arenatext-2026-10-15-0ebb411abf00 · arena_rating · leader | 1,445.9399% of row best · rating · glm-5; 95% CI [1441.71120059, 1450.14553038]; votes 29272; rank 60 | 1,462.40100% of row best · rating · glm-5.1; 95% CI [1458.83486169, 1465.97294166]; votes 62889; rank 39 |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark winsNo overall winner | 1 benchmark winNo overall winner |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | GLM-5 | GLM-5.1 |
|---|---|---|
| Developer | Z.ai | Z.ai |
| Family | Glm 5 | Glm 5 1 |
| Model | GLM-5 | GLM-5.1 |
| Version | GLM-5 | GLM-5.1 |
| Lifecycle | active | active |
| Released | Unknown | Unknown |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
| Context window | 203K | 203K |
| Total parameters | 753.9B | 753.9B |
| Active parameters | Unknown | Unknown |
| License | mit | mit |
| Open weights | Yes | Yes |
| API available | Yes | Yes |
| Self-hostable | Yes | Yes |
| Provider access | Deepinfra (Standard), Hugging Face (Standard), Openrouter (Standard), Together Ai (Standard) | Deepinfra (Standard), Hugging Face (Standard), Openrouter (Standard), Together Ai (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
GLM 5 Capabilities
GLM 5.1 Capabilities
Related Comparisons
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|---|---|---|---|
GLM-5Z.ai | vs | GLM-5.3Z.ai | family variantstext |
| vs | GLM-5Z.ai | cross-developer peerstext | |
| vs | GLM-5Z.ai | cross-developer peerstext | |
 DeepSeek-R1DeepSeek | vs | GLM-5Z.ai | cross-developer peerstext |
DeepSeek-V3DeepSeek | vs | GLM-5Z.ai | cross-developer peerstext |
DeepSeek-V3.2DeepSeek | vs | GLM-5Z.ai | cross-developer peerstext |
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| vs | GLM-5Z.ai | cross-developer peerstext | |
GLM-5Z.ai | vs | GLM-5.2Z.ai | family variantstext |
GLM-5Z.ai | vs | GLM-OCRZ.ai | family variantstext |
Primary Evidence
Sources and Freshness
Questions
GLM 5 vs GLM 5.1 FAQs
Is GLM 5 or GLM 5.1 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both GLM 5 and GLM 5.1, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, GLM 5 or GLM 5.1?+
GLM 5 is $0.60 and GLM 5.1 is $1.05 per million tokens, so GLM 5 is cheaper on this metric. GLM 5 is $1.92 and GLM 5.1 is $3.50 per million tokens, so GLM 5 is cheaper on this metric.
Which has a larger context window, GLM 5 or GLM 5.1?+
Both models have the same sourced context window: 202,752 tokens each.
Which performs better in benchmarks, GLM 5 or GLM 5.1?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can GLM 5 or GLM 5.1 be self-hosted?+
Both models have the same sourced self-hosting status: supported. GLM 5 is open weight; GLM 5.1 is open weight.
Can GLM 5 and GLM 5.1 understand images?+
GLM 5 is not documented with image input; GLM 5.1 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, GLM 5 or GLM 5.1?+
Neither model has a sourced maximum output in this comparison, so a larger limit cannot be determined.
Do GLM 5 and GLM 5.1 support reasoning and tool use?+
GLM 5: reasoning and tool calling. GLM 5.1: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, GLM 5 or GLM 5.1?+
GLM 5 has 4 sourced provider routes; GLM 5.1 has 4, a tie.
Which offers better value, GLM 5 or GLM 5.1?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.