feat(xai): update model YAMLs [bot]

[harshiv-26]

Auto-generated by poc-agent for provider xai.

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Note

Medium Risk
Updates pricing, limits, and supported features for multiple xAI models; misconfigurations here can impact billing, routing, and request parameter validation. Also changes model lifecycle flags/statuses (e.g., deprecating grok-2-image, adjusting grok-4 context window), which may affect availability/selection.

Overview
Refreshes xAI Grok model metadata/configuration across image and chat models.

Image models: adds removeParams to grok-2-image-1212, marks grok-2-image as isDeprecated: true and status: retired, and ensures grok-2-image-latest is status: active.

Chat models: updates costs (including batch pricing) and feature flags (e.g., adds prompt_caching, system_messages, structured_output in places), introduces tiered_pricing for several grok-4* variants, adds a docs sources link for grok-4-fast-non-reasoning, and changes grok-4 pricing plus reduces its context_window from 2000000 to 256000.

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[github-actions]

/test-models

[harshiv-26]

Gateway test results

• Total: 107
• Passed: 104
• Failed: 0
• Validation failed: 0
• Errored: 0
• Skipped: 3
• Success rate: 100.0%

Provider	Model	Scenarios
xai	grok-2-image	skipped: skip-check
xai	grok-2-image-1212	skipped: skip-check
xai	grok-2-image-latest	skipped: skip-check
xai	grok-3	success: params, structured-output, params:stream, tool-call, tool-call:stream, structured-output:stream
xai	grok-3-fast	success: params, json-output:stream, structured-output, params:stream, json-output, tool-call:stream, tool-call, structured-output:stream
xai	grok-3-mini	success: params:stream, structured-output:stream, params, tool-call, tool-call:stream, structured-output, reasoning:stream, reasoning
xai	grok-3-mini-fast-latest	success: params, tool-call:stream, structured-output:stream, tool-call, params:stream, structured-output, reasoning, reasoning:stream
xai	grok-3-mini-latest	success: params:stream, params, structured-output, tool-call:stream, structured-output:stream, tool-call, reasoning:stream, reasoning
xai	grok-4	success: params, params:stream, tool-call, tool-call:stream, structured-output:stream, structured-output
xai	grok-4-1-fast	success: params, params:stream, structured-output:stream, structured-output, tool-call, tool-call:stream
xai	grok-4-1-fast-non-reasoning	success: structured-output, structured-output:stream, params:stream, params, tool-call, tool-call:stream
xai	grok-4-1-fast-non-reasoning-latest	success: structured-output:stream, structured-output, params:stream, params, tool-call, tool-call:stream
xai	grok-4-1-fast-reasoning-latest	success: params:stream, params, tool-call:stream, structured-output, tool-call, structured-output:stream
xai	grok-4-fast	success: params, params:stream, tool-call:stream, structured-output:stream, tool-call, structured-output
xai	grok-4-fast-non-reasoning	success: structured-output, structured-output:stream, tool-call, tool-call:stream, params, params:stream
xai	grok-4-fast-non-reasoning-latest	success: params:stream, params, structured-output:stream, structured-output, tool-call, tool-call:stream
xai	grok-4-fast-reasoning-latest	success: params:stream, params, tool-call:stream, structured-output:stream, structured-output, tool-call
xai	grok-4.20-beta-latest	success: tool-call:stream, params:stream, params, tool-call, structured-output:stream, structured-output
xai	grok-code-fast	success: structured-output:stream, params:stream, tool-call:stream, tool-call, structured-output, params

Skipped (3)

xai/grok-2-image — skip-check (skipped)

Skip reason:

unsupported mode 'image'

xai/grok-2-image-1212 — skip-check (skipped)

Skip reason:

unsupported mode 'image'

xai/grok-2-image-latest — skip-check (skipped)

Skip reason:

unsupported mode 'image'

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