feat: add groq/qwen/qwen3.8-27b

[guillaumegay13]

✨ What changed

• Adds qwen/qwen3.8-27b (groq) to the catalog, params cloned from groq/qwen3.6-27b.yaml.
• Hosted serving: the model is developed by qwen (OpenRouter: qwen/qwen3.8-27b); this entry documents groq's serving of it, probed against groq's endpoint.

💭 Why

The provider serves it but the catalog doesn't list it. Param surfaces differ per serving provider, so each host gets its own probed entry (models.dev-style).

📝 Notes

• Liveness ✅ only: the model answers on its real endpoint; unverified params are listed in the evidence table below.
• Draft PR, auto-proposed by the modelparams agent.

Param verification evidence

param	check	ok	detail
(baseline)	accepted	✅	1-shot answers 200
max_completion_tokens	min=1	✅
max_completion_tokens	range policed	✅	vendor max 16384
temperature	min=0	✅
temperature	max=2	✅
temperature	range policed	✅	temperature=4 rejected
top_p	min=0	✅
top_p	max=1	✅
top_p	range policed	✅	top_p=2 rejected
frequency_penalty	min=-2	✅
frequency_penalty	max=2	✅
frequency_penalty	range policed	✅	frequency_penalty=4 rejected
presence_penalty	min=-2	✅
presence_penalty	max=2	✅
presence_penalty	range policed	✅	presence_penalty=4 rejected
seed	declared	➖	type integer has no probe — value carried from sibling/docs, not verified
stop	declared	➖	type string has no probe — value carried from sibling/docs, not verified
reasoning_effort	=none	✅	accepted (no effect oracle for this value)
reasoning_effort	=default	❌	ACCEPTED BUT NO EFFECT — response shows no sign the param was honored
reasoning_effort	enum policed	✅	vendor also accepts [low, medium, high] — YAML is missing them
reasoning_format	=hidden	❌	ACCEPTED BUT NO EFFECT — response shows no sign the param was honored
reasoning_format	=raw	❌	ACCEPTED BUT NO EFFECT — response shows no sign the param was honored
reasoning_format	=parsed	❌	ACCEPTED BUT NO EFFECT — response shows no sign the param was honored
reasoning_format	enum policed	✅	bogus value rejected
response_format.type	=text	✅	accepted (no effect oracle for this value)
response_format.type	=json_object	✅	accepted + effect confirmed in response
response_format.type	enum policed	✅	vendor also accepts [response_format, response_format.type, response_format.type] — YAML is missing them

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Project	Deployment	Actions	Updated
modelparams.dev	Ready	Preview	Sep 3, 2026 5:31am UTC