2026-05-06

CometAPI: Grok-4.3 Now Available

Change Details

• New model: grok-4.3 is now live — excels at autonomous reasoning, knowledge work, and tool use. Ideal for complex agent workflows and deep analysis tasks.

Recommended Models

• Model name: grok-4.3

Developer Documentation

• Note: This model only supports the Chat Completions endpoint (/v1/chat/completions).
• Quick Integration Guide (OpenAI Format)

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CometAPI: Grok-4.2 Series Price Reduction

Pricing Changes

• The grok-4.2 series pricing has been reduced to match grok-4.3 pricing.
• Changes take effect immediately. No action required on your end.

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CometAPI: Grok Legacy Model Deprecation Notice

Change Details

• Deprecating soon: The following models will be retired on May 15, 2026 at 12:00 PM Pacific Time (PT). Please refer to the migration table below:

Deprecated Model	Recommended Replacement
grok-4-1-fast-reasoning	grok-4.3
grok-4-1-fast-non-reasoning	grok-4.20-non-reasoning
grok-4-fast-reasoning	grok-4.3
grok-4-fast-non-reasoning	grok-4.20-non-reasoning
grok-4-0709	grok-4.3
grok-code-fast-1	grok-4.3

• Migration guide: Reasoning models → grok-4.3; Non-reasoning models → grok-4.20-non-reasoning.