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Grok 4.1 Fast (Reasoning)
xai·xai/grok-4-1-fast-reasoning·BETA·Closed·grok series
Fast Grok model for responsive chat, reasoning, and tool-assisted work
At a glance
Reference price$0.20 / $1.50 per 1M
Cache read $0.02 · FrogBot
Lowest paid$0.18 / $0.45
Jiekou.AI Gateway · 1.1× spread
Context256,000
⚠ Providers report 128,000–2,000,000; the table below is authoritative
Output limit128,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured output✓ Temperature✓ Attachments
⚠ Providers report capability flags inconsistently
Modalities
TextImagePDF
Knowledge cutoff2025-06
Released / updated2025-11-19 / 2026-01
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 8 providers7 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Jiekou.AI | Gateway | $0.18 | $0.45 | — | — | 2,000,000 ⚠ | 2,000,000 | |
| 302.AI | Gateway | $0.20 | $0.50 | — | — | 2,000,000 ⚠ | 30,000 | |
| Azure | First-party | $0.20 | $0.50 | $0.05 | — | 128,000 ⚠ | 8,192 | beta |
| FrogBot | Gateway | $0.20 | $0.50 | $0.05 | — | 2,000,000 ⚠ | 128,000 | |
| Vercel AI Gateway spacexai/grok-4.1-fast-reasoning | Cloud | $0.20 | $0.50 | $0.05 | — | 1,000,000 ⚠ | 1,000,000 | |
| DevPass (LLM Gateway) | Gateway | $0.20 | $0.50 | $0.05 | — | 2,000,000 ⚠ | 30,000 | |
| FrogBot grok-code-fast-1 | Gateway | $0.20 | $1.50 | $0.02 | — | 256,000 | 128,000 | |
| Poe xai/grok-4.1-fast-reasoning | Gateway | — | — | — | — | 2,000,000 ⚠ | 30,000 | hostTable.undisclosed |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1Azure$47.00
2FrogBot$47.00
3Vercel AI Gateway$47.00
4DevPass (LLM Gateway)$47.00
5Jiekou.AI$58.50
6302.AI$65.00
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
effort = loweffort = mediumeffort = high
6 / 8 providers expose no reasoning control (reasoning_options: []).
Related models
Grok 4.6same series$2.00 / $6.00Grok 4.6 (xAI)same series$2.00 / $6.00Grok 4.6 (AWS Bedrock)same series$2.00 / $6.00DeepSeek V4 Flashcheaper alternative$0.14 / $0.28GPT-5 Nanocheaper alternative$0.05 / $0.40GLM-4.7-Flashcheaper alternative$0 / $0MiMo-V2.5cheaper alternative$0.14 / $0.28
Price historyone sample accumulated per data sync
Input listOutput listMin blended