Model comparison

GPT-5.1 Codex Max vs GLM-5

Compare GPT-5.1 Codex Max (OpenAI) and GLM-5 (Z Ai) by price, context, capabilities, and latency.

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Which should you pick?

  • Price: GLM-5 is cheaper ($0.58 / 1M tokens input / $2.58 / 1M tokens output) vs GPT-5.1 Codex Max ($1.25 / 1M tokens input / $10 / 1M tokens output).
  • Context: GPT-5.1 Codex Max has the larger context window (400k tokens).
  • GPT-5.1 Codex Max adds: Vision.

Side by side

GPT-5.1 Codex Max vs GLM-5 — full comparison

Compare price, provider, context, capabilities, latency, and source basis.

ModelProviderInputOutputContextCapabilitiesBest forLatencyStatusSource
GPT-5.1 Codex Maxopenai/gpt-5.1-codex-maxOpenAI$1.25 / 1M tokens$10 / 1M tokens400k
StreamingTool callingJSON modeVision
image understanding, multimodal chat1802-3024msCatalogPlatform curated
GLM-5z-ai/glm-5Z AiStarting at $0.58 / 1M tokens$2.58 / 1M tokens198k
StreamingTool callingJSON modeLong context
General chat via Z Ai, API workloads1431-2367msCatalogPlatform curated

FAQ

GPT-5.1 Codex Max vs GLM-5 FAQ

Is GPT-5.1 Codex Max or GLM-5 cheaper?

GLM-5 is cheaper ($0.58 / 1M tokens input / $2.58 / 1M tokens output) vs GPT-5.1 Codex Max ($1.25 / 1M tokens input / $10 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.

Which has a larger context window, GPT-5.1 Codex Max or GLM-5?

GPT-5.1 Codex Max is larger (400k tokens) vs 198k tokens.

GPT-5.1 Codex Max vs GLM-5 for Long context: which should I pick?

Both target Long context. Pick GLM-5 to optimize cost, or GPT-5.1 Codex Max for the longer context window. Test both on real prompts before committing production traffic.

GPT-5.1 Codex Max detailsGLM-5 detailsPricing calculatorOpenAI-compatible quickstart