GLM 5.1 vs GLM 5.3
At a Glance
| Compare |  GLM 5.1Z.ai | GLM 5.3Z.ai |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v4.4 | UnrankedNot in the 57-model eligible cohort | #14 of 5771.9 score · 2/3 sources · provisional · missing ARC-AGI-2 · full-core range 47.9–81.3 |
| CostLower is better · Published-token output estimate | UnrankedNot in the 27-model eligible cohort | #22 of 27$0.248 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.9 | UnrankedNot in the 27-model eligible cohort | #19 of 2745.9 score · 2/3 sources · provisional · missing ARC-AGI-2 · full-core range 33.9–50.6 |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $1.05Deepinfra ↗ · Sep 24, 2026 | $0.90Deepinfra ↗ · Oct 19, 2026 |
| Output priceFrom · USD / 1M tokens | $3.50Deepinfra ↗ · Sep 24, 2026 | $4.00Deepinfra ↗ · Oct 19, 2026 |
| Context windowMaximum documented tokens | 203K | 1,000K |
| Model facts checked | Aug 28, 2026View model evidence → | Aug 29, 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-5.1 | GLM-5.3 |
|---|---|---|
| LMArena Text Arenatext-2026-10-15-0ebb411abf00 · arena_rating · leader | 1,462.4099% of row best · rating · glm-5.1; 95% CI [1458.83486169, 1465.97294166]; votes 62889; rank 39 | 1,471.46100% of row best · rating · glm-5.3-max; 95% CI [1466.26042381, 1476.65163576]; votes 22543; rank 27 |
| 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-5.1 | GLM-5.3 |
|---|---|---|
| Developer | Z.ai | Z.ai |
| Family | Glm 5 1 | Glm 5 3 |
| Model | GLM-5.1 | GLM-5.3 |
| Version | GLM-5.1 | GLM-5.3 |
| Lifecycle | active | active |
| Released | Unknown | Unknown |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
| Context window | 203K | 1,000K |
| Total parameters | 753.9B | Unknown |
| Active parameters | Unknown | Unknown |
| License | mit | Unknown |
| Open weights | Yes | No |
| API available | Yes | Yes |
| Self-hostable | Yes | No |
| Provider access | Deepinfra (Standard), Hugging Face (Standard), Openrouter (Standard), Together Ai (Standard) | Deepinfra (Standard), Fireworks Ai (Standard), Together Ai (Standard), Z.ai (Standard) |
| Capabilities | chat, generation, reasoning, tools | agents, chat, reasoning, structured_outputs, tools |
GLM 5.1 Capabilities
GLM 5.3 Capabilities
Related Comparisons
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|---|---|---|---|
GLM-5.1Z.ai | vs | GLM-5.2Z.ai | family variantstext |
| vs | GLM-5.1Z.ai | cross-developer peerstext | |
| vs | GLM-5.1Z.ai | cross-developer peerstext | |
 DeepSeek-R1DeepSeek | vs | GLM-5.1Z.ai | cross-developer peerstext |
DeepSeek-V3DeepSeek | vs | GLM-5.1Z.ai | cross-developer peerstext |
DeepSeek-V3.2DeepSeek | vs | GLM-5.1Z.ai | cross-developer peerstext |
 Kimi-K2-InstructMoonshot AI | vs | GLM-5.1Z.ai | cross-developer peerstext |
Kimi-K2-ThinkingMoonshot AI | vs | GLM-5.1Z.ai | cross-developer peerstext |
Kimi-K2.6Moonshot AI | vs | GLM-5.1Z.ai | cross-developer peerstext |
GLM-5Z.ai | vs | GLM-5.1Z.ai | family variantstext |
GLM-5.1Z.ai | vs | GLM-5V-TurboZ.ai | family variantstext |
Primary Evidence
Sources and Freshness
Questions
GLM 5.1 vs GLM 5.3 FAQs
Is GLM 5.1 or GLM 5.3 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both GLM 5.1 and GLM 5.3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, GLM 5.1 or GLM 5.3?+
GLM 5.1 is $1.05 and GLM 5.3 is $0.90 per million tokens, so GLM 5.3 is cheaper on this metric. GLM 5.1 is $3.50 and GLM 5.3 is $4.00 per million tokens, so GLM 5.1 is cheaper on this metric.
Which has a larger context window, GLM 5.1 or GLM 5.3?+
GLM 5.3 has the larger sourced context window. GLM 5.1 supports 202,752 tokens and GLM 5.3 supports 1,000,000 tokens.
Which performs better in benchmarks, GLM 5.1 or GLM 5.3?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can GLM 5.1 or GLM 5.3 be self-hosted?+
GLM 5.1 is documented as self-hostable; GLM 5.3 is documented as not self-hostable. GLM 5.1 is open weight; GLM 5.3 is not marked open weight.
Can GLM 5.1 and GLM 5.3 understand images?+
GLM 5.1 is not documented with image input; GLM 5.3 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, GLM 5.1 or GLM 5.3?+
GLM 5.3 has a sourced maximum output of 131,072 tokens; GLM 5.1's maximum output is not reported. A larger limit cannot be determined.
Do GLM 5.1 and GLM 5.3 support reasoning and tool use?+
GLM 5.1: reasoning and tool calling. GLM 5.3: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, GLM 5.1 or GLM 5.3?+
GLM 5.1 has 4 sourced provider routes; GLM 5.3 has 4, a tie.
Which offers better value, GLM 5.1 or GLM 5.3?+
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.