[BOT ISSUE] fix: add missing xAI models grok-4.20-0309-non-reasoning and grok-4.20-multi-agent-0309

[github-actions]

Missing models

Two xAI models are listed on the official xAI developer documentation but are absent from the model catalog (packages/proxy/schema/model_list.json). The catalog currently has the "beta" variants (grok-4.20-beta-0309-non-reasoning, grok-4.20-multi-agent-beta-0309) but not the non-beta versions, which are the only IDs now listed in official docs.

The catalog also already has the sibling grok-4.20-0309-reasoning (line 6801, without "beta"), confirming the naming pattern.

Model details

grok-4.20-0309-non-reasoning

Field	Value
Model ID	grok-4.20-0309-non-reasoning
Format	openai
Flavor	chat
Multimodal	true
Input cost (per 1M tokens)	$1.25
Output cost (per 1M tokens)	$2.50
Max input tokens	2000000
Display name	Grok 4.20 (Non-Reasoning)
Available providers	["xAI"]

grok-4.20-multi-agent-0309

Field	Value
Model ID	grok-4.20-multi-agent-0309
Format	openai
Flavor	chat
Multimodal	true
Input cost (per 1M tokens)	$1.25
Output cost (per 1M tokens)	$2.50
Reasoning	true
Max input tokens	2000000
Display name	Grok 4.20 Multi-Agent
Available providers	["xAI"]

Verification checklist

• Cross-source confirmation: Both model IDs confirmed on the xAI developer documentation page, which includes both a model listing section and a pricing table listing the same IDs with pricing. Two independent fetches of the page (via docs.x.ai/developers/models and docs.x.ai/docs/models) returned consistent results.
• Recent commits check: Neither model ID appears in any recent commits. The catalog has no entry for grok-4.20-0309-non-reasoning or grok-4.20-multi-agent-0309.
• ID format validation: Follows the exact naming convention of the existing sibling grok-4.20-0309-reasoning (line 6801 in model_list.json). The non-beta naming matches how xAI now lists all grok-4.20 models.

Verification notes

Field	Source
Model IDs	xAI developer docs — model listing section
Pricing ($1.25/$2.50)	xAI developer docs — pricing table
Context window (2M tokens)	xAI developer docs — listed as "2M" context
Format, flavor, multimodal, provider	Inferred from sibling catalog entries (grok-4.20-0309-reasoning at line 6801, grok-4.20-beta-0309-non-reasoning at line 6815)

Fields NOT verified from official sources:

• max_output_tokens — not published on the xAI docs page. The sibling entries use 2,000,000. The downstream fix job should verify via the API.
• input_cache_read_cost_per_mil_tokens — not listed in the current pricing table. The sibling entry has $0.20, but this is unverified for the new pricing tier.
• reasoning for grok-4.20-multi-agent-0309 — inferred from the beta variant grok-4.20-multi-agent-beta-0309 which has reasoning: true. Not explicitly stated in docs.

Additional context

The xAI docs no longer list any "beta" variants. The catalog's grok-4.20-beta-0309-non-reasoning, grok-4.20-beta-0309-reasoning, and grok-4.20-multi-agent-beta-0309 entries may need deprecation marking separately.

{
  "kind": "missing_model",
  "provider": "xAI",
  "models": ["grok-4.20-0309-non-reasoning", "grok-4.20-multi-agent-0309"],
  "status": "active",
  "model_specs": {
    "grok-4.20-0309-non-reasoning": {
      "format": "openai",
      "flavor": "chat",
      "multimodal": true,
      "input_cost_per_mil_tokens": 1.25,
      "output_cost_per_mil_tokens": 2.5,
      "displayName": "Grok 4.20 (Non-Reasoning)",
      "max_input_tokens": 2000000,
      "available_providers": ["xAI"]
    },
    "grok-4.20-multi-agent-0309": {
      "format": "openai",
      "flavor": "chat",
      "multimodal": true,
      "input_cost_per_mil_tokens": 1.25,
      "output_cost_per_mil_tokens": 2.5,
      "reasoning": true,
      "displayName": "Grok 4.20 Multi-Agent",
      "max_input_tokens": 2000000,
      "available_providers": ["xAI"]
    }
  },
  "source_urls": [
    "https://docs.x.ai/developers/models"
  ]
}