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Claude Haiku 5.5 vs Grok-1.5

Claude Haiku 5.5 leads the LLM Stats Score 50.0 to -2.7.

Anthropic · xAI · Updated for 2026

Which is better?

Claude Haiku 5.5 leads the overall LLM Stats Score 50.0 to -2.7, ranking #19 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Haiku 5.5

  • overall performance matters — it scores 50.0 and ranks #19 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Oct 2026

Choose Grok-1.5

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

Claude Haiku 5.5
Anthropic
Grok-1.5
xAI
Core performance indexes
LLM Stats Score
50.0
#19
-2.7
#356
Reasoning
47.2
#27
-2.2
#346
Coding
40.2
#13
-0.9
#261
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.10 / M
— / M
Output price
$0.50 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Haiku 5.5
Grok-1.5
Math
25.7#110
4.9#283
Vision
30.4#33
-5.2#212
Multimodal
31.4#27
-2.7#172
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

36 reported for Claude Haiku 5.5 · 9 for Grok-1.5

No common benchmarks found

Claude Haiku 5.5 and Grok-1.5don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Haiku 5.5 specifies input context (1,000,000 tokens). Only Claude Haiku 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Haiku 5.5
Input1,000,000 tokens
Output128,000 tokens
xAI
Grok-1.5
Input- tokens
Output- tokens
Thu Oct 08 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Haiku 5.5 supports multimodal inputs, whereas Grok-1.5 does not.

Claude Haiku 5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Haiku 5.5

Text
Images
Audio
Video

Grok-1.5

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Haiku 5.5

Proprietary

Closed source

Grok-1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Haiku 5.5 was released on 2026-10-07, while Grok-1.5 was released on 2024-03-28.

Claude Haiku 5.5 is 31 months newer than Grok-1.5.

Claude Haiku 5.5

Oct 7, 2026

0 days ago

2.5yr newer
Grok-1.5

Mar 28, 2024

2.5 years ago

Knowledge Cutoff

When training data ends

Claude Haiku 5.5 has a documented knowledge cutoff of 2026-06-01, while Grok-1.5's cutoff date is not specified.

We can confirm Claude Haiku 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without Grok-1.5's cutoff date.

Claude Haiku 5.5

Jun 2026

Grok-1.5

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Haiku 5.5 and Grok-1.5 side-by-side, then vote on the output you prefer.

Claude Haiku 5.5
✓ Preferred
Grok-1.5
Open in Playground

FAQ

Common questions about Claude Haiku 5.5 vs Grok-1.5.

Which is better, Claude Haiku 5.5 or Grok-1.5?

Claude Haiku 5.5 leads the LLM Stats Score 50.0 to -2.7. Claude Haiku 5.5 is made by Anthropic 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 Claude Haiku 5.5 compare to Grok-1.5 in benchmarks?

Claude Haiku 5.5 scores Global-MMLU: 87.8%, MILU: 87.6%, BenchCAD (with Python tool): 87.0%, Chartography: 86.2%, SWE-bench Multilingual: 83.7%. 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 Claude Haiku 5.5 and Grok-1.5?

Claude Haiku 5.5 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 Claude Haiku 5.5 and Grok-1.5?

Key differences include LLM Stats Score (50.0 vs -2.7), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Haiku 5.5 and Grok-1.5?

Claude Haiku 5.5 is developed by Anthropic and Grok-1.5 is developed by xAI.

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