Grok 4.1 Fast Reasoning API via TokenMix
Use Grok 4.1 Fast Reasoning from xAI as a chat model through the TokenMix AI API relay and multi-model gateway.
Reasoning-enabled variant of Grok 4.1 Fast, xAI's best agentic tool-calling model with 2M context window. Excels at complex real-world use cases with halved hallucination rates compared to Grok 4 Fast.
API access
- Base URL:
https://api.tokenmix.ai/v1 - Model ID:
grok-4.1-fast-reasoning - OpenAI SDK compatible. Change the base URL and use your TokenMix API key.
Pricing
Input $0.19/M tokens, output $0.475/M tokens
Capabilities
Vision, Function calling, JSON mode, Streaming, Reasoning
Model specs
- Context: 2000K tokens
- Max output: 30K tokens
Availability
1/1 available API endpoints are healthy right now.
Recent performance
TTFT 3025ms, latency 12886ms, throughput 108.2 tok/s.
Start using this model
Create an API key, top up from $1 when needed, and call this model through the TokenMix OpenAI-compatible endpoint.