Model Comparison

Claude Haiku 4.5 vs Grok 4.5Which is better in 2026?

Grok 4.5 significantly outperforms across most benchmarks. Claude Haiku 4.5 is 1.5x cheaper per token.

Verdict: Claude Haiku 4.5 vs Grok 4.5 — which is better?

Claude Haiku 4.5 (by Anthropic) and Grok 4.5 (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Haiku 4.5 outperforms in 0 benchmarks, while Grok 4.5 is better at 2 benchmarks (GDPval-AA, GPQA). Grok 4.5 significantly outperforms across most benchmarks.

On price, Claude Haiku 4.5 is roughly 1.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok 4.5 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Haiku 4.5 if…

  • cost matters — it's about 1.5x cheaper per token

Choose Grok 4.5 if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 500,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Haiku 4.5 outperforms in 0 benchmarks, while Grok 4.5 is better at 2 benchmarks (GDPval-AA, GPQA).

Grok 4.5 significantly outperforms across most benchmarks.

Tue Jul 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude Haiku 4.5 costs less

For input processing, Claude Haiku 4.5 ($1.00/1M tokens) is 2.0x cheaper than Grok 4.5 ($2.00/1M tokens).

For output processing, Claude Haiku 4.5 ($5.00/1M tokens) is 1.2x cheaper than Grok 4.5 ($6.00/1M tokens).

In conclusion, Grok 4.5 is more expensive than Claude Haiku 4.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Jul 21 2026 • llm-stats.com
Anthropic
Claude Haiku 4.5
Input tokens$1.00
Output tokens$5.00
Best providerAnthropic
xAI
Grok 4.5
Input tokens$2.00
Output tokens$6.00
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok 4.5 accepts 500,000 input tokens compared to Claude Haiku 4.5's 200,000 tokens. Only Claude Haiku 4.5 specifies output context (64,000 tokens).

Anthropic
Claude Haiku 4.5
Input200,000 tokens
Output64,000 tokens
xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Haiku 4.5 and Grok 4.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Haiku 4.5

Text
Images
Audio
Video

Grok 4.5

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 4.5

Proprietary

Closed source

Grok 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Haiku 4.5 was released on 2025-10-15, while Grok 4.5 was released on 2026-07-16.

Grok 4.5 is 9 months newer than Claude Haiku 4.5.

Claude Haiku 4.5

Oct 15, 2025

9 months ago

Grok 4.5

Jul 16, 2026

4 days ago

9mo newer

Knowledge Cutoff

When training data ends

Claude Haiku 4.5 has a knowledge cutoff of 2025-02-01, while Grok 4.5 has a cutoff of 2026-02-01.

Grok 4.5 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to Claude Haiku 4.5 (2025-02-01).

Claude Haiku 4.5

Feb 2025

Grok 4.5

Feb 2026

1 yr newer

Provider Availability

Claude Haiku 4.5 is available from Anthropic, Vertex AI. Grok 4.5 is available from xAI.

Claude Haiku 4.5

anthropic logo
Anthropic
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M
vertex logo
Unknown Organization
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M

Grok 4.5

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Less expensive input tokens
Less expensive output tokens
xAI
Larger context window (500,000 tokens)
Higher GDPval-AA score (51.4% vs 30.1%)
Higher GPQA score (93.0% vs 73.0%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Haiku 4.5 and Grok 4.5 side-by-side, then vote on the output you prefer.

Claude Haiku 4.5
✓ Preferred
Grok 4.5
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Haiku 4.5
xAI
Grok 4.5

FAQ

Common questions about Claude Haiku 4.5 vs Grok 4.5.

Which is better, Claude Haiku 4.5 or Grok 4.5?

Grok 4.5 significantly outperforms across most benchmarks. Claude Haiku 4.5 is made by Anthropic and Grok 4.5 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Haiku 4.5 compare to Grok 4.5 in benchmarks?

Claude Haiku 4.5 scores Tau2 Retail: 83.2%, MMMLU: 83.0%, Tau2 Telecom: 83.0%, AIME 2025: 80.7%, SWE-Bench Verified: 73.3%. Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, Artificial Analysis Coding Agent Index v1.1: 76.0%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%.

Is Claude Haiku 4.5 cheaper than Grok 4.5?

Claude Haiku 4.5 is 2.0x cheaper for input tokens. Claude Haiku 4.5 costs $1.00/M input and $5.00/M output via anthropic. Grok 4.5 costs $2.00/M input and $6.00/M output via xai.

What are the context window sizes for Claude Haiku 4.5 and Grok 4.5?

Claude Haiku 4.5 supports 200K tokens and Grok 4.5 supports 500K 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 4.5 and Grok 4.5?

Key differences include context window (200K vs 500K), input pricing ($1.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Haiku 4.5 and Grok 4.5?

Claude Haiku 4.5 is developed by Anthropic and Grok 4.5 is developed by xAI.

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