Grok-4.20 Beta Reasoning: Benchmarks, Pricing & Context Window
Grok-4.20 Beta Reasoning is a language model from xAI, released in March 2026, with multimodal input.
Grok 4.20 Beta Reasoning is xAI's reasoning-optimized variant of the Grok 4.20 model family. Released as a beta on March 9, 2026, it uses thinking tokens for enhanced chain-of-thought reasoning, featuring a 2 million token context window
Grok-4.20 Beta Reasoning benchmarks
Capability tiers
Standing within each category, adjusted for leaderboard depth.
Real tasks performance
High-confidence performance for Grok-4.20 Beta Reasoning across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.
Performance by conversation depth
How Grok-4.20 Beta Reasoning holds up as conversations get longer.
Quality Tracker
Grok-4.20 Beta Reasoning Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
llm-stats.com - Fri Sep 11 2026Grok-4.20 Beta Reasoning pricing
Providers
Grok-4.20 Beta Reasoning starts at $2.00 per million input tokens and $6.00 per million output tokens via xAI.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 xAI | $2.00 | — | $6.00 | 2.0M/30.0K | — | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
Grok-4.20 Beta Reasoning context window
Input and output token limits for Grok-4.20 Beta Reasoning, plus how it ranks on long-context understanding.
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Grok-4.20 Beta Reasoning latency
Grok-4.20 Beta Reasoning time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.
Grok-4.20 Beta Reasoning examples
Recent arena outputs from Grok-4.20 Beta Reasoning, picked from the highest-ranked matchups.
Grok-4.20 Beta Reasoning license
Grok-4.20 Beta Reasoning is a proprietary model available under its provider's product and API terms.
- License
- Proprietary
- Hosted access
Proprietary license - usage restrictions apply
Grok-4.20 Beta Reasoning resources
Official sources for Grok-4.20 Beta Reasoning: provider documentation, official playground.
Grok-4.20 Beta Reasoning vs other models
The most-compared alternatives to Grok-4.20 Beta Reasoning are Claude Haiku 4.5, Gemini 3.1 Flash-Lite, MiniMax M2.7. Open any pair side-by-side for benchmarks, pricing, context, and latency.
Models like Grok-4.20 Beta Reasoning
Models ranked just above and below Grok-4.20 Beta Reasoning by LLM Stats score.
FAQ
Common questions about Grok-4.20 Beta Reasoning.