Grok 4.5 vs GLM 5.3
Benchmark Performance
Available Benchmarks
| Benchmark | Grok 4.5 | GLM-5.3 |
|---|---|---|
| LMArena Agent Arenaagent-2026-08-31-011508720696 · outcome_score · leader | 6.06100% of row best · score · Grok 4.5; 95% CI [4.91016619, 7.21148996]; sessions 34008; observations 1655564; rank 13 | 3.8298% of row best · score · GLM 5.3 (Max); 95% CI [3.01733683, 4.62585790]; sessions 41022; observations 2958163; rank 20 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,451.8298% of row best · rating · grok-4.5; 95% CI [1446.90989155, 1456.73122428]; votes 25873; rank 39 | 1,474.49100% of row best · rating · glm-5.3-max; 95% CI [1467.12172899, 1481.86064533]; votes 7401; rank 18 |
| LiveBench2026-06-25 · overall · leader | 80.01100% of row best · percent · grok-4.5 · 10,517 output tokens / case | 79.1599% of row best · percent · glm-5.3 · 62,090 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 2 benchmark winsOverall lead | 1 benchmark win |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Grok 4.5 | GLM-5.3 |
|---|---|---|
| Developer | xAI | Z.ai |
| Family | Grok 4 | Glm 5 3 |
| Model | Grok 4.5 | GLM-5.3 |
| Version | Grok 4.5 | GLM-5.3 |
| Lifecycle | active | active |
| Released | 2026-07-16 | Unknown |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 500K | 1,000K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Xai (Standard) | Deepinfra (Standard), Fireworks Ai (Standard), Together Ai (Standard), Z.ai (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | agents, chat, reasoning, structured_outputs, tools |
13 comparable fields · 8 material differences · Pair passes the primary-source comparison gate
Grok 4.5 Capabilities
GLM 5.3 Capabilities
Internal Comparison Graph
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| vs | Grok 4.5xAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Grok 4.5 vs GLM 5.3 FAQs
Is Grok 4.5 or GLM 5.3 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Grok 4.5 and GLM 5.3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Grok 4.5 or GLM 5.3?+
Grok 4.5 is $2.00 and GLM 5.3 is $1.20 per million tokens, so GLM 5.3 is cheaper on this metric. Grok 4.5 is $6.00 and GLM 5.3 is $4.00 per million tokens, so GLM 5.3 is cheaper on this metric.
Which has a larger context window, Grok 4.5 or GLM 5.3?+
GLM 5.3 has the larger sourced context window. Grok 4.5 supports 500K and GLM 5.3 supports 1,000K.
Which performs better in benchmarks, Grok 4.5 or GLM 5.3?+
Grok 4.5 leads the current overall benchmark count. The result uses 3 protocol-matched benchmarks from 2 publishers; it is not a universal quality score.
Can Grok 4.5 or GLM 5.3 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Grok 4.5 is not marked open weight; GLM 5.3 is not marked open weight.
Can Grok 4.5 and GLM 5.3 understand images?+
Grok 4.5 is 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, Grok 4.5 or GLM 5.3?+
Neither has a larger sourced maximum output. Grok 4.5 is — and GLM 5.3 is 131K.
Do Grok 4.5 and GLM 5.3 support reasoning and tool use?+
Grok 4.5: reasoning, tool calling, and image input. GLM 5.3: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, Grok 4.5 or GLM 5.3?+
Grok 4.5 has 1 sourced provider route; GLM 5.3 has 4, so GLM 5.3 has broader tracked availability.
Which offers better value, Grok 4.5 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.