Text model protocols and endpoints

A concise guide for platform developers choosing Chat Completions, Anthropic Messages, or Responses for text models.

supported_endpoint_types is a discovery signal, not an end-to-end tool guarantee. Choose models by endpoint, streaming behavior, tool calling, and output structure.

Endpoint selection

Endpoint	Use it when	Typical tools
POST /v1/chat/completions	OpenAI-compatible providers, text chat, default coding-agent path	opencode OpenAI-compatible, Kilo OpenAI Compatible, Hermes custom endpoint, OpenClaw openai-completions
POST /v1/messages	Claude/Anthropic providers and Claude Messages request shape	Claude Code, Kilo Anthropic, opencode Anthropic, OpenClaw anthropic-messages
POST /v1/responses	A tool or SDK explicitly calls OpenAI Responses API, such as responses.create	OpenAI Responses SDK, Agents SDK, Responses runtime

Model matrix

Model	Chat Completions	Anthropic Messages	Responses	Recommendation
glm-4.5-air	Available	Recommended	Not supported	Use with OpenAI-compatible or Anthropic tools
glm-4.7	Available	Recommended	Not supported	Use with OpenAI-compatible or Anthropic tools
glm-4.7-flash	Available	Recommended	Not supported	Good for lightweight tasks
glm-5	Available	Recommended	Not supported	Good for reasoning tasks
glm-5-turbo	Available	Recommended	Not supported	Good lightweight model
glm-5.2	Available	Recommended	Not supported	Recommended Anthropic-tool default
MiniMax-M2.5	Available	Recommended	Available	Increase max_output_tokens for Responses
MiniMax-M2.5-highspeed	Available	Recommended	Available	Increase max_output_tokens for Responses
MiniMax-M2.7	Available	Recommended	Available	Increase max_output_tokens for Responses
MiniMax-M2.7-highspeed	Available	Recommended	Available	Increase max_output_tokens for Responses
MiniMax-M3	Available	Recommended	Available	Recommended MiniMax tool model
qwen3-coder-plus	Available	Recommended	Available	Good for coding and tool workflows
qwen3-max	Available	Recommended	Available	Good for general reasoning and review
qwen3.5-flash	Available	Recommended	Available	Responses may include reasoning summary
qwen3.6-plus	Available	Recommended	Available	Responses may include reasoning summary
deepseek-v3-2-251201	Available	Recommended	Available	Passed opencode Anthropic-provider tool-workflow validation
seed-1-6-250915	Available	Recommended	Available	Use with OpenAI-compatible, Anthropic, or Responses
seed-1-6-flash-250715	Available	Not supported	Available	The upstream provider does not support /v1/messages; prefer Chat Completions or Responses
seed-1-8-251228	Available	Recommended	Available	Use with OpenAI-compatible, Anthropic, or Responses
seed-2-0-lite-260228	Available	Recommended	Available	Use with OpenAI-compatible, Anthropic, or Responses
seed-2-0-mini-260215	Available	Recommended	Available	Use with OpenAI-compatible, Anthropic, or Responses
seed-2-0-pro-260328	Available	Recommended	Available	Use with OpenAI-compatible, Anthropic, or Responses

Ecosystem tool guidance

Tool	Preferred endpoint	Suggested models
Claude Code	/v1/messages	glm-5.2, MiniMax-M3
opencode	/v1/chat/completions	glm-5.2, MiniMax-M3
Kilo Code	/v1/chat/completions or /v1/messages	glm-5.2, MiniMax-M3
Hermes Agent	/v1/chat/completions	glm-5.2, MiniMax-M3, seed-2-0-pro-260328
OpenClaw	/v1/chat/completions or /v1/messages	glm-5.2, MiniMax-M3
OpenAI Responses SDK / Agents SDK	/v1/responses	Qwen, MiniMax, Seed, deepseek-v3-2-251201

Known boundaries

• GLM models are not currently Responses-path models.
• seed-1-6-flash-250715 is not supported by its upstream provider on /v1/messages; other Seed models passed opencode Anthropic-provider validation.
• deepseek-v3-2-251201 passed opencode Anthropic-provider tool-workflow validation.
• In Responses, some MiniMax, Qwen, and Seed models return reasoning or reasoning summary. Extract user-visible text from output[].