fix: add xAI models grok-4.20-0309-non-reasoning and grok-4.20-multi-agent-0309

[github-actions]

fix: add xAI models grok-4.20-0309-non-reasoning and grok-4.20-multi-agent-0309

Closes #544

Source issue: #544

Summary

Field	Value
Provider	xai
Primary model	grok-4.20-0309-non-reasoning
Changed models	grok-4.20-0309-non-reasoning grok-4.20-multi-agent-0309
Added models	grok-4.20-0309-non-reasoning grok-4.20-multi-agent-0309
Updated models	None
Verification sources	1

Verified metadata

Model	Display name	Parent	Providers	Format	Flavor	Token limits	Pricing	Lifecycle
grok-4.20-0309-non-reasoning	Grok 4.20 (Non-Reasoning)		xAI	openai	chat	input=2000000, output=not provided	in/out=1.25/2.5 per 1M	multimodal=true
grok-4.20-multi-agent-0309	Grok 4.20 Multi-Agent		xAI	openai	chat	input=2000000, output=not provided	in/out=1.25/2.5 per 1M	multimodal=true; reasoning=true

Verification notes

No LLM verification step ran — model metadata was already complete in the issue.

sync_models vs proposed update

sync_models cross-check found differences. Official provider verification was used for the applied values, and sync_models discrepancies are listed below for review.

Model	Field	Proposed update	sync_models	sync_models source models
grok-4.20-0309-non-reasoning	catalog entry	present	missing	None
grok-4.20-multi-agent-0309	catalog entry	present	missing	None

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
ai-proxy	Ready	Preview, Comment	May 20, 2026 4:38pm