[BOT ISSUE] xAI: mark retired grok-4-fast and grok-4-1-fast models as deprecated

[github-actions]

Summary

Follow-up to #696. Four additional xAI model families were retired on May 15, 2026 but are not marked as deprecated in model_list.json. These models no longer appear on the xAI models page.

Retired models (top 3 model IDs)

Model ID	Line	Replacement
grok-4-1-fast-reasoning	6860	grok-4.3
grok-4-1-fast-non-reasoning	6832	grok-4.3
grok-4-fast-reasoning	7013	grok-4.3

Additional entries also needing deprecation

Model ID	Line
grok-4-fast-non-reasoning	6988
grok-4-1-fast-reasoning-latest	6874
grok-4-1-fast-non-reasoning-latest	6846
grok-4-fast-reasoning-latest	7027
grok-4-fast-non-reasoning-latest	7002

Verification

• Source 1: xAI May 15, 2026 Model Retirement page — lists all retired models and their replacements
• Source 2: xAI models page — these models are no longer listed as active
• ID format: All are existing entries in the catalog with no deprecated field
• Recent commits: No recent commits marking these as deprecated
• Not a duplicate: [BOT ISSUE] xAI: mark retired grok-3, grok-4-0709, grok-code-fast-1 as deprecated #696 covers grok-3, grok-4-0709, grok-code-fast-1 (different model IDs)

Suggested fix

Add "deprecated": true and "deprecation_date": "2026-05-15" to each entry.

{
  "kind": "deprecation",
  "provider": "xAI",
  "models": ["grok-4-1-fast-reasoning", "grok-4-1-fast-non-reasoning", "grok-4-fast-reasoning"],
  "status": "active",
  "fields_to_update": {
    "deprecated": {"old": null, "new": true},
    "deprecation_date": {"old": null, "new": "2026-05-15"}
  },
  "source_urls": [
    "https://docs.x.ai/developers/migration/may-15-retirement",
    "https://docs.x.ai/developers/models"
  ]
}

[github-actions]

Prepared catalog updates for grok-4-1-fast-reasoning, grok-4-1-fast-non-reasoning, grok-4-fast-reasoning, grok-4-fast-non-reasoning, grok-4-1-fast-reasoning-latest, grok-4-1-fast-non-reasoning-latest, grok-4-fast-reasoning-latest, grok-4-fast-non-reasoning-latest. Updated models: grok-4-1-fast-reasoning, grok-4-1-fast-non-reasoning, grok-4-fast-reasoning, grok-4-fast-non-reasoning, grok-4-1-fast-reasoning-latest, grok-4-1-fast-non-reasoning-latest, grok-4-fast-reasoning-latest, grok-4-fast-non-reasoning-latest.

Verification sources: https://docs.x.ai/developers/migration/may-15-retirement, https://docs.x.ai/developers/models
Verified metadata applied:

• grok-4-1-fast-reasoning: format=openai, flavor=chat, parent=grok-4-1-fast-reasoning-latest, max_input_tokens=2000000, max_output_tokens=2000000, pricing(input/output per 1M)=0.2/0.5, input_cache_read_cost_per_mil_tokens=0.05, providers=xAI, multimodal=true, deprecated=true, deprecation_date=2026-05-15
• grok-4-1-fast-non-reasoning: format=openai, flavor=chat, parent=grok-4-1-fast-non-reasoning-latest, max_input_tokens=2000000, max_output_tokens=2000000, pricing(input/output per 1M)=0.2/0.5, input_cache_read_cost_per_mil_tokens=0.05, providers=xAI, multimodal=true, deprecated=true, deprecation_date=2026-05-15
• grok-4-fast-reasoning: format=openai, flavor=chat, parent=grok-4-fast-reasoning-latest, max_input_tokens=2000000, max_output_tokens=2000000, pricing(input/output per 1M)=0.2/0.5, input_cache_read_cost_per_mil_tokens=0.05, providers=xAI, multimodal=true, deprecated=true, deprecation_date=2026-05-15
• grok-4-fast-non-reasoning: format=openai, flavor=chat, parent=grok-4-fast-non-reasoning-latest, max_input_tokens=2000000, max_output_tokens=2000000, pricing(input/output per 1M)=0.2/0.5, input_cache_read_cost_per_mil_tokens=0.05, providers=xAI, multimodal=true, deprecated=true, deprecation_date=2026-05-15
• grok-4-1-fast-reasoning-latest: format=openai, flavor=chat, displayName=Grok 4.1 Fast, max_input_tokens=2000000, max_output_tokens=2000000, pricing(input/output per 1M)=0.2/0.5, input_cache_read_cost_per_mil_tokens=0.05, providers=xAI, multimodal=true, deprecated=true, deprecation_date=2026-05-15
• grok-4-1-fast-non-reasoning-latest: format=openai, flavor=chat, displayName=Grok 4.1 Fast (Non-Reasoning), max_input_tokens=2000000, max_output_tokens=2000000, pricing(input/output per 1M)=0.2/0.5, input_cache_read_cost_per_mil_tokens=0.05, providers=xAI, multimodal=true, deprecated=true, deprecation_date=2026-05-15
• grok-4-fast-reasoning-latest: format=openai, flavor=chat, displayName=Grok 4 Fast, max_input_tokens=2000000, max_output_tokens=2000000, pricing(input/output per 1M)=0.2/0.5, input_cache_read_cost_per_mil_tokens=0.05, providers=not provided, multimodal=true, deprecated=true, deprecation_date=2026-05-15
• grok-4-fast-non-reasoning-latest: format=openai, flavor=chat, displayName=Grok 4 Fast (Non-Reasoning), max_input_tokens=2000000, max_output_tokens=2000000, pricing(input/output per 1M)=0.2/0.5, input_cache_read_cost_per_mil_tokens=0.05, providers=not provided, multimodal=true, deprecated=true, deprecation_date=2026-05-15

Opened #710 to apply the catalog update.