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Beam 1.0 vs Grok-1.5

Beam 1.0 leads the LLM Stats Score 44.6 to -3.1.

Reflection AI · xAI · Updated for 2026

Which is better?

Beam 1.0 leads the overall LLM Stats Score 44.6 to -3.1, ranking #46 overall.

In the 1 individual benchmarks reported for both models, Beam 1.0 wins 1; this is a narrower head-to-head signal than the composite indexes.

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 coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 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-1.5

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

Beam 1.0
Reflection AI
Grok-1.5
xAI
Core performance indexes
LLM Stats Score
44.6
#46
-3.1
#367
Reasoning
45.5
#37
-2.7
#357
Coding
33.7
#39
-1.0
#271
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$0.40 / M
— / M
Output price
$1.20 / M
— / M
Context window
1,048,576
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Beam 1.0
Grok-1.5
Math
35.1#45
4.9#289
Vision
15.9#105
-5.3#223
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

22 reported for Beam 1.0 · 9 for Grok-1.5

1 shared

Beam 1.0 outperforms in 1 benchmarks (GPQA), while Grok-1.5 is better at 0 benchmarks.

Beam 1.0 significantly outperforms across most benchmarks.

Thu Oct 22 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Beam 1.0 specifies input context (1,048,576 tokens). Only Beam 1.0 specifies output context (131,072 tokens).

Reflection AI
Beam 1.0
Input1,048,576 tokens
Output131,072 tokens
xAI
Grok-1.5
Input- tokens
Output- tokens
Thu Oct 22 2026 • llm-stats.com

License

Usage and distribution terms

Beam 1.0 is licensed under Apache 2.0, while Grok-1.5 uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

Beam 1.0

Apache 2.0

Open weights

Grok-1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Beam 1.0 was released on 2026-10-16, while Grok-1.5 was released on 2024-03-28.

Beam 1.0 is 31 months newer than Grok-1.5.

Beam 1.0

Oct 16, 2026

3 days ago

2.6yr newer
Grok-1.5

Mar 28, 2024

2.6 years ago

Knowledge Cutoff

When training data ends

Beam 1.0 has a documented knowledge cutoff of 2026-06-30, while Grok-1.5'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-1.5's cutoff date.

Beam 1.0

Jun 2026

Grok-1.5

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Beam 1.0 and Grok-1.5 side-by-side, then vote on the output you prefer.

Beam 1.0
✓ Preferred
Grok-1.5
Open in Playground

FAQ

Common questions about Beam 1.0 vs Grok-1.5.

Which is better, Beam 1.0 or Grok-1.5?

Beam 1.0 leads the LLM Stats Score 44.6 to -3.1. Beam 1.0 is made by Reflection AI and Grok-1.5 is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Beam 1.0 compare to Grok-1.5 in benchmarks?

Beam 1.0 scores AIME 2026: 97.7%, GPQA: 90.6%, LiveCodeBench: 88.3%, SWE-Bench Verified: 81.6%, MCP Atlas: 80.8%. Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%.

What are the context window sizes for Beam 1.0 and Grok-1.5?

Beam 1.0 supports 1.0M tokens and Grok-1.5 supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Beam 1.0 and Grok-1.5?

Key differences include LLM Stats Score (44.6 vs -3.1), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Beam 1.0 and Grok-1.5?

Beam 1.0 is developed by Reflection AI and Grok-1.5 is developed by xAI.

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