Model parameters & capabilities

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What each model actually accepts, taken from the published capability manifest rather than from a vendor page. Support states are the contract: Native is forwarded unchanged, Translated crosses a protocol boundary, Normalized is rewritten before it leaves us, and Not verified means nobody has checked yet — it is not a claim that the field works. Models without a published profile are absent rather than guessed at.

doubao-seedance-2-5-260628

Protocols
openai_video
Endpoints
openai-video
Modalities
text, image → video

Capabilities

Capability Support Evidence Notes
async_task Native Live-verified Successful asynchronous tasks are present in the dated production evidence.
generated_audio Not verified Catalogue-declared Request serialization exists, but acceptance has not been independently verified.
image_to_video Not verified Catalogue-declared The dated usage records do not retain enough request detail to verify this feature.

Parameters

Field Type Support Evidence Notes
duration integer Translated Code-checked The accepted range and value fidelity have not been independently verified.
image string Translated Code-checked → content[].image_url
a single image is normalized into the image list and carried as an image_url content item
A single image is normalized into the image list before serialization.
images array Translated Code-checked → content[].image_url
each URL is carried as one image_url content item; duplicate input_reference values are removed
The accepted item-count range has not been independently verified.
input_reference string Translated Code-checked → content[].image_url
the reference is appended to the image content list unless the same URL is already present
model string Native Live-verified Required
prompt string Translated Live-verified Required
→ content[].text
the prompt is carried into one text item in the outbound content array
seconds string Normalized Code-checked → duration
a positive decimal string is converted to an integer duration and takes precedence over duration

Capability profile 2026-09-04.1 · Last verified 2026-09-04

glm-5

Protocols
openai_chat · anthropic_messages
Endpoints
openai · anthropic
Modalities
text → text

Capabilities

Capability Support Evidence Notes
prompt_cache Not verified Catalogue-declared
reasoning Not verified Catalogue-declared
streaming Native Code-checked
structured_output Not verified Catalogue-declared
tools Not verified Catalogue-declared

Parameters

Field Type Support Evidence Notes
max_completion_tokens integer Translated Code-checked → max_tokens
✕ max_tokens
The upstream has no such field; the gateway carries it across as max_tokens. When you send both, this one wins.
max_tokens integer Not verified Catalogue-declared ✕ max_completion_tokens
Forwarded unchanged when it is the only limit you send. Send max_completion_tokens as well and that one replaces it. Whether the model honours the value is not yet verified.
messages array Native Code-checked Required
model string Native Code-checked Required
The catalogue's exact model id. Vendor-side aliases are not accepted.
stream boolean Native Code-checked
temperature number Not verified Catalogue-declared Forwarded unchanged. The accepted range, and whether the model honours every value in it, are not yet verified — which is why this is not published as native.
top_p number Normalized Code-checked top_p >= 1 is rewritten to 0.99 before the request leaves us
The gateway clamps this value before the request leaves us, so a request can be served with a value you did not send.

Capability profile 2026-09-04.1 · Last verified 2026-08-27

glm-5-turbo

Protocols
openai_chat · anthropic_messages
Endpoints
openai · anthropic
Modalities
text → text

Capabilities

Capability Support Evidence Notes
prompt_cache Not verified Catalogue-declared
reasoning Not verified Catalogue-declared
streaming Native Code-checked
structured_output Not verified Catalogue-declared
tools Not verified Catalogue-declared

Parameters

Field Type Support Evidence Notes
max_completion_tokens integer Translated Code-checked → max_tokens
✕ max_tokens
The upstream has no such field; the gateway carries it across as max_tokens. When you send both, this one wins.
max_tokens integer Not verified Catalogue-declared ✕ max_completion_tokens
Forwarded unchanged when it is the only limit you send. Send max_completion_tokens as well and that one replaces it. Whether the model honours the value is not yet verified.
messages array Native Code-checked Required
model string Native Code-checked Required
The catalogue's exact model id. Vendor-side aliases are not accepted.
stream boolean Native Code-checked
temperature number Not verified Catalogue-declared Forwarded unchanged. The accepted range, and whether the model honours every value in it, are not yet verified — which is why this is not published as native.
top_p number Normalized Code-checked top_p >= 1 is rewritten to 0.99 before the request leaves us
The gateway clamps this value before the request leaves us, so a request can be served with a value you did not send.

Capability profile 2026-09-04.1 · Last verified 2026-08-27

glm-5.1

Protocols
openai_chat · anthropic_messages · gemini_generate_content
Endpoints
openai · anthropic · gemini
Modalities
text → text

Capabilities

Capability Support Evidence Notes
prompt_cache Not verified Catalogue-declared
reasoning Not verified Catalogue-declared
streaming Native Code-checked
structured_output Not verified Catalogue-declared
tools Not verified Catalogue-declared

Parameters

Field Type Support Evidence Notes
max_completion_tokens integer Translated Code-checked → max_tokens
✕ max_tokens
The upstream has no such field; the gateway carries it across as max_tokens. When you send both, this one wins.
max_tokens integer Not verified Catalogue-declared ✕ max_completion_tokens
Forwarded unchanged when it is the only limit you send. Send max_completion_tokens as well and that one replaces it. Whether the model honours the value is not yet verified.
messages array Native Code-checked Required
model string Native Code-checked Required
The catalogue's exact model id. Vendor-side aliases are not accepted.
stream boolean Native Code-checked
temperature number Not verified Catalogue-declared Forwarded unchanged. The accepted range, and whether the model honours every value in it, are not yet verified — which is why this is not published as native.
top_p number Normalized Code-checked top_p >= 1 is rewritten to 0.99 before the request leaves us
The gateway clamps this value before the request leaves us, so a request can be served with a value you did not send.

Capability profile 2026-09-04.1 · Last verified 2026-08-27

glm-5.2

Protocols
openai_chat · anthropic_messages · gemini_generate_content
Endpoints
openai · anthropic · gemini
Modalities
text → text

Capabilities

Capability Support Evidence Notes
prompt_cache Not verified Catalogue-declared
reasoning Not verified Catalogue-declared
streaming Native Code-checked
structured_output Not verified Catalogue-declared
tools Not verified Catalogue-declared

Parameters

Field Type Support Evidence Notes
max_completion_tokens integer Translated Code-checked → max_tokens
✕ max_tokens
The upstream has no such field; the gateway carries it across as max_tokens. When you send both, this one wins.
max_tokens integer Not verified Catalogue-declared ✕ max_completion_tokens
Forwarded unchanged when it is the only limit you send. Send max_completion_tokens as well and that one replaces it. Whether the model honours the value is not yet verified.
messages array Native Code-checked Required
model string Native Code-checked Required
The catalogue's exact model id. Vendor-side aliases are not accepted.
stream boolean Native Code-checked
temperature number Not verified Catalogue-declared Forwarded unchanged. The accepted range, and whether the model honours every value in it, are not yet verified — which is why this is not published as native.
top_p number Normalized Code-checked top_p >= 1 is rewritten to 0.99 before the request leaves us
The gateway clamps this value before the request leaves us, so a request can be served with a value you did not send.

Capability profile 2026-09-04.1 · Last verified 2026-08-27

glm-5.3

Protocols
openai_chat · anthropic_messages
Endpoints
openai · anthropic
Modalities
text → text

Capabilities

Capability Support Evidence Notes
prompt_cache Not verified Catalogue-declared
reasoning Not verified Catalogue-declared
streaming Native Code-checked
structured_output Not verified Catalogue-declared
tools Not verified Catalogue-declared

Parameters

Field Type Support Evidence Notes
max_completion_tokens integer Translated Code-checked → max_tokens
✕ max_tokens
The upstream has no such field; the gateway carries it across as max_tokens. When you send both, this one wins.
max_tokens integer Not verified Catalogue-declared ✕ max_completion_tokens
Forwarded unchanged when it is the only limit you send. Send max_completion_tokens as well and that one replaces it. Whether the model honours the value is not yet verified.
messages array Native Code-checked Required
model string Native Code-checked Required
The catalogue's exact model id. Vendor-side aliases are not accepted.
stream boolean Native Code-checked
temperature number Not verified Catalogue-declared Forwarded unchanged. The accepted range, and whether the model honours every value in it, are not yet verified — which is why this is not published as native.
top_p number Normalized Code-checked top_p >= 1 is rewritten to 0.99 before the request leaves us
The gateway clamps this value before the request leaves us, so a request can be served with a value you did not send.

Capability profile 2026-09-04.1 · Last verified 2026-08-27

glm-5.3-flash

Protocols
openai_chat · anthropic_messages
Endpoints
openai · anthropic
Modalities
text → text

Capabilities

Capability Support Evidence Notes
prompt_cache Not verified Catalogue-declared
reasoning Not verified Catalogue-declared
streaming Native Code-checked
structured_output Not verified Catalogue-declared
tools Not verified Catalogue-declared

Parameters

Field Type Support Evidence Notes
max_completion_tokens integer Translated Code-checked → max_tokens
✕ max_tokens
The upstream has no such field; the gateway carries it across as max_tokens. When you send both, this one wins.
max_tokens integer Not verified Catalogue-declared ✕ max_completion_tokens
Forwarded unchanged when it is the only limit you send. Send max_completion_tokens as well and that one replaces it. Whether the model honours the value is not yet verified.
messages array Native Code-checked Required
model string Native Code-checked Required
The catalogue's exact model id. Vendor-side aliases are not accepted.
stream boolean Native Code-checked
temperature number Not verified Catalogue-declared Forwarded unchanged. The accepted range, and whether the model honours every value in it, are not yet verified — which is why this is not published as native.
top_p number Normalized Code-checked top_p >= 1 is rewritten to 0.99 before the request leaves us
The gateway clamps this value before the request leaves us, so a request can be served with a value you did not send.

Capability profile 2026-09-04.1 · Last verified 2026-08-27

glm-5v-turbo

Protocols
openai_chat · anthropic_messages
Endpoints
openai · anthropic
Modalities
text, image → text

Capabilities

Capability Support Evidence Notes
prompt_cache Not verified Catalogue-declared
reasoning Not verified Catalogue-declared
streaming Native Code-checked
structured_output Not verified Catalogue-declared
tools Not verified Catalogue-declared

Parameters

Field Type Support Evidence Notes
max_completion_tokens integer Translated Code-checked → max_tokens
✕ max_tokens
The upstream has no such field; the gateway carries it across as max_tokens. When you send both, this one wins.
max_tokens integer Not verified Catalogue-declared ✕ max_completion_tokens
Forwarded unchanged when it is the only limit you send. Send max_completion_tokens as well and that one replaces it. Whether the model honours the value is not yet verified.
messages array Native Code-checked Required
model string Native Code-checked Required
The catalogue's exact model id. Vendor-side aliases are not accepted.
stream boolean Native Code-checked
temperature number Not verified Catalogue-declared Forwarded unchanged. The accepted range, and whether the model honours every value in it, are not yet verified — which is why this is not published as native.
top_p number Normalized Code-checked top_p >= 1 is rewritten to 0.99 before the request leaves us
The gateway clamps this value before the request leaves us, so a request can be served with a value you did not send.

Capability profile 2026-09-04.1 · Last verified 2026-08-27

glm-asr-2512

Protocols
openai_audio_transcription
Endpoints
audio-transcription
Modalities
audio → text

Parameters

Field Type Support Evidence Notes
file file Native Live-verified Required
model string Native Live-verified Required
response_format string Not verified Catalogue-declared

Capability profile 2026-09-04.1 · Last verified 2026-08-27

glm-tts

Protocols
openai_audio_speech
Endpoints
audio-speech
Modalities
text → audio

Parameters

Field Type Support Evidence Notes
input string Native Live-verified Required
model string Native Live-verified Required
response_format string Normalized Live-verified pcm / wav
an omitted response_format is filled in with this model's published default before the request leaves us
This model does not accept mp3. Omitting the format returns raw PCM, which most audio players cannot play — send a supported format explicitly.
voice string Native Live-verified tongtong
Leave it blank to get the published default voice.

Capability profile 2026-09-04.1 · Last verified 2026-08-27