Beam 1.0 vs Grok 4 Fast
Beam 1.0 leads the LLM Stats Score 44.6 to 31.2. Grok 4 Fast is 2.2x cheaper per token.
Reflection AI · xAI · Updated for 2026
Which is better?
Beam 1.0 leads the overall LLM Stats Score 44.6 to 31.2, ranking #46 overall.
In the 4 individual benchmarks reported for both models, Beam 1.0 wins 4; this is a narrower head-to-head signal than the composite indexes.
On price, Grok 4 Fast is roughly 2.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok 4 Fast also accepts a larger context window (2,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Beam 1.0
- overall performance matters — it scores 44.6 and ranks #46 on LLM Stats
- your work emphasizes reasoning and agents — it leads those capability indexes
- you value its reported benchmark strengths — it wins 4 of 4 exact shared results
- you want the most recent training data — it shipped Oct 2026
- you need open weights you can self-host or fine-tune
Choose Grok 4 Fast
- cost matters — it's about 2.2x cheaper per token
- you process long inputs — it offers a 2,000,000 token context window
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
22 reported for Beam 1.0 · 7 for Grok 4 Fast
Beam 1.0 outperforms in 4 benchmarks (BrowseComp, GPQA, Humanity's Last Exam, LiveCodeBench), while Grok 4 Fast is better at 0 benchmarks.
Beam 1.0 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Beam 1.0 ($0.40/1M tokens) is 2.0x more expensive than Grok 4 Fast ($0.20/1M tokens).
For output processing, Beam 1.0 ($1.20/1M tokens) is 2.4x more expensive than Grok 4 Fast ($0.50/1M tokens).
In conclusion, Beam 1.0 is more expensive than Grok 4 Fast.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok 4 Fast accepts 2,000,000 input tokens compared to Beam 1.0's 1,048,576 tokens. Beam 1.0 can generate longer responses up to 131,072 tokens, while Grok 4 Fast is limited to 30,000 tokens.
Input capabilities
Documented input modalities across available providers
Grok 4 Fast supports multimodal inputs, whereas Beam 1.0 does not.
Grok 4 Fast can handle both text and other forms of data like images, making it suitable for multimodal applications.
Beam 1.0
Grok 4 Fast
License
Usage and distribution terms
Beam 1.0 is licensed under Apache 2.0, while Grok 4 Fast uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Apache 2.0
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Beam 1.0 was released on 2026-10-16, while Grok 4 Fast was released on 2025-08-28.
Beam 1.0 is 14 months newer than Grok 4 Fast.
Oct 16, 2026
3 days ago
1.1yr newerAug 28, 2025
1.1 years ago
Knowledge Cutoff
When training data ends
Beam 1.0 has a documented knowledge cutoff of 2026-06-30, while Grok 4 Fast's cutoff date is not specified.
We can confirm Beam 1.0's training data extends to 2026-06-30, but cannot make a direct comparison without Grok 4 Fast's cutoff date.
Jun 2026
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Provider Availability
Beam 1.0 is available from Together, Reflection AI. Grok 4 Fast is available from xAI.
Beam 1.0
Grok 4 Fast
Outputs Comparison
Judge for yourself.
Run your own prompts against Beam 1.0 and Grok 4 Fast side-by-side, then vote on the output you prefer.
FAQ
Common questions about Beam 1.0 vs Grok 4 Fast.