GLM: GLM 5.3
glm5.3GLM 5.3 is an open-weight mixture-of-experts reasoning and coding model with a 262k context window, hosted by Reka. It is served over an OpenAI-compatible API with native tool calling, structured outputs, logprobs, and streaming.
- Modalities
- →
- In / out price
- $1.17 / $3.96 per 1M
- Context
- 262k
- Max output
- 262,144 tokens
ChatMulti-turn conversations via /v1/chat/completions.ChatStreamingTokens arrive as they are generated with stream: true.StreamingTool callingNative tool calls, including parallel calls.Tool callingReasoningThinks before answering; the trace is billed as output.ReasoningStructured outputsJSON Schema responses; JSON mode on most models.Structured outputsLogprobsReturns token log-probabilities with logprobs: true.LogprobsPrompt cachingRepeated prompt prefixes bill at the cache-read rate.Prompt caching