Grok-4-Fast-Reasoning by Poe | AI model information

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Model details

Grok-4-Fast-Reasoning

Poexai/grok-4-fast-reasoninggrok

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Quick Info

Provider: Poe
Model key: xai/grok-4-fast-reasoning
Release date: Sep 16, 2025
Last updated: Sep 16, 2025

Cost

Input token cost: $0.20
Output token cost: $0.50

Limits

Output tokens: 128,000 tokens
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May 28, 2026, 10:25 PMUTC

Claude Opus 4.8 is now available on Poe. Anthropic’s latest flagship model is built for enterprise-grade knowledge work, codebase-scale migrations, multi-agent coordination, and long-running autonomous tasks, with sharper judgment and improved honesty. Try it today at:…

May 19, 2026, 10:39 PMUTC

Gemini-3.5-Flash is now available on Poe. Google’s latest Flash model is built for fast, efficient responses, with strong performance on coding, complex workflows, and agentic tasks. Try it today at: poe.com/Gemini-3.5-Flash

May 6, 2026, 5:37 PMUTC

Memory is now available Poe can remember your preferences, interests, and what you're working on across chats, so you don't have to repeat yourself. Works with most official bots, including Claude, GPT, and Gemini. Off by default. Turn it on in Settings → Memory. Video

May 2, 2026, 4:37 AMUTC

Check it out on all platforms at poe.com/Grok-4.3

May 2, 2026, 4:36 AMUTC

Grok 4.3 is now available on Poe. It’s a great daily driver, not just a model that wins random benchmarks, but one that holds up for real-life use. It’s also economical enough to use every day, with strong performance for the price. After sharing a lot of feedback with the…