GPT-5 Mini vs GLM 5.3
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | GPT-5 Mini | GLM-5.3 |
|---|---|---|
| CostLower is better · Published-token output estimate | UnrankedNot in the 36-model eligible cohort | #28 of 36$0.248 per LiveBench case |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
| Benchmark | GPT-5 Mini | GLM-5.3 |
|---|---|---|
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,372.9493% of row best · rating · gpt-5-mini-high; 95% CI [1368.36426468, 1377.52117993]; votes 26551; rank 162 | 1,474.49100% of row best · rating · glm-5.3-max; 95% CI [1467.12172899, 1481.86064533]; votes 7401; rank 18 |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark wins | 1 benchmark winOverall lead |
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 | GPT-5 Mini | GLM-5.3 |
|---|---|---|
| Developer | OpenAI | Z.ai |
| Family | Gpt 5 | Glm 5 3 |
| Model | GPT-5 Mini | GLM-5.3 |
| Version | GPT-5 Mini | GLM-5.3 |
| Lifecycle | active | active |
| Released | 2025-08-07 | Unknown |
| Knowledge cutoff | 2024-05-31 | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 400K | 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 | Openai (Standard), Openrouter (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
GPT-5 Mini Capabilities
GLM 5.3 Capabilities
Internal Comparison Graph
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Primary Evidence
Sources and Freshness
Questions
GPT-5 Mini vs GLM 5.3 FAQs
Is GPT-5 Mini or GLM 5.3 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both GPT-5 Mini and GLM 5.3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, GPT-5 Mini or GLM 5.3?+
GPT-5 Mini is $0.125 and GLM 5.3 is $1.20 per million tokens, so GPT-5 Mini is cheaper on this metric. GPT-5 Mini is $1.00 and GLM 5.3 is $4.00 per million tokens, so GPT-5 Mini is cheaper on this metric.
Which has a larger context window, GPT-5 Mini or GLM 5.3?+
GLM 5.3 has the larger sourced context window. GPT-5 Mini supports 400K and GLM 5.3 supports 1,000K.
Which performs better in benchmarks, GPT-5 Mini 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 GPT-5 Mini or GLM 5.3 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. GPT-5 Mini is not marked open weight; GLM 5.3 is not marked open weight.
Can GPT-5 Mini and GLM 5.3 understand images?+
GPT-5 Mini 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, GPT-5 Mini or GLM 5.3?+
GLM 5.3 has the larger sourced maximum output: GPT-5 Mini supports 128K and GLM 5.3 supports 131K output tokens.
Do GPT-5 Mini and GLM 5.3 support reasoning and tool use?+
GPT-5 Mini: 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, GPT-5 Mini or GLM 5.3?+
GPT-5 Mini has 2 sourced provider routes; GLM 5.3 has 4, so GLM 5.3 has broader tracked availability.
Which offers better value, GPT-5 Mini 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.