Conversational refinement
Grok 4.1 was tuned for style, personality, helpfulness, creative work, emotional nuance, and collaborative interaction.
Historical tool archive
Grok 4.1: historical overview
Grok 4.1 was xAI's November 2025 model update for more natural creative and collaborative conversations. It has since been superseded, and its Grok 4.1 Fast API variants were retired in May 2026.
No longer active
Archive
What Grok 4.1 was
xAI released Grok 4.1 on November 17, 2025 across grok.com, X, iOS, and Android. The release focused on creative writing, emotional nuance, collaborative interactions, personality, instruction following, and reduced factual errors compared with the preceding Grok 4 production model.
A separate Grok 4.1 Fast API followed on November 19 with reasoning and non-reasoning variants, a two-million-token context window, tool calling, web and X search, file retrieval, code execution, and MCP tools. xAI retired those API variants on May 15, 2026 and redirected their model slugs to Grok 4.3. Grok 4.6 is now xAI's documented flagship and the model included with current SuperGrok.
Past capabilities
What Grok 4.1 offered
Reasoning and fast responses
The consumer release offered thinking and non-thinking behavior, while Grok 4.1 Fast exposed reasoning and non-reasoning API variants.
Long-context tool calling
Grok 4.1 Fast launched with a two-million-token context window and training aimed at multi-turn tool use.
Agent Tools API
Developers could pair the model with xAI-hosted web search, X search, code execution, file retrieval, and MCP tools.
Availability
Why this listing is historical
At launch, Grok 4.1 Fast cost $0.20 per million input tokens, $0.05 per million cached input tokens, and $0.50 per million output tokens, with tool calls starting at $5 per 1,000 successful invocations. Those models are retired; xAI says their slugs redirect to a newer model and use the replacement model's pricing.
- Grok 4.1 is no longer xAI's current consumer model
- The Grok 4.1 Fast API variants were retired on May 15, 2026
- Old API slugs redirect to a different model, so output, latency, and cost no longer match the original release
Status checked . Review the historical source ↗
Current options
Active Grok 4.1 alternatives
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Grok 4.1 FAQs
Is Grok 4.1 still active?
It is no longer xAI's current model. The Grok 4.1 Fast API variants were retired on May 15, 2026, and xAI now documents Grok 4.6 as its flagship.
What did Grok 4.1 introduce?
It emphasized more natural creative, emotional, and collaborative responses. The Fast API release added long-context reasoning and non-reasoning variants designed for tool-calling agents.
What happens to a Grok 4.1 Fast API request?
xAI says the retired Grok 4.1 Fast slugs continue to resolve but are automatically served by a newer replacement model, with the replacement's behavior and pricing.
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