Claude Haiku 5.5 vs Grok 4.5
Claude Haiku 5.5 and Grok 4.5 are closely matched at 49.9 and 45.5 on the LLM Stats Score. Claude Haiku 5.5 is 15.0x cheaper per token.
Anthropic · xAI · Updated for 2026
Which is better?
Claude Haiku 5.5 and Grok 4.5 are closely matched on the overall LLM Stats Score at 49.9 and 45.5.
In the 3 individual benchmarks reported for both models, Claude Haiku 5.5 wins 3; this is a narrower head-to-head signal than the composite indexes.
On price, Claude Haiku 5.5 is roughly 15.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude Haiku 5.5 also accepts a larger context window (1,000,000 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 Claude Haiku 5.5
- your work emphasizes coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 3 of 3 exact shared results
- cost matters — it's about 15.0x cheaper per token
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Oct 2026
Choose Grok 4.5
- you want predictable pricing at $2.00/M input and $6.00/M output
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
36 reported for Claude Haiku 5.5 · 15 for Grok 4.5
Claude Haiku 5.5 outperforms in 3 benchmarks (FrontierCode 1.1, SWE-Bench Pro, Terminal-Bench 4.0), while Grok 4.5 is better at 0 benchmarks.
Claude Haiku 5.5 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, Claude Haiku 5.5 ($0.10/1M tokens) is 20.0x cheaper than Grok 4.5 ($2.00/1M tokens).
For output processing, Claude Haiku 5.5 ($0.50/1M tokens) is 12.0x cheaper than Grok 4.5 ($6.00/1M tokens).
In conclusion, Grok 4.5 is more expensive than Claude Haiku 5.5.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Haiku 5.5 accepts 1,000,000 input tokens compared to Grok 4.5's 500,000 tokens. Only Claude Haiku 5.5 specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Both Claude Haiku 5.5 and Grok 4.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Haiku 5.5
Grok 4.5
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Haiku 5.5 was released on 2026-10-07, while Grok 4.5 was released on 2026-07-16.
Claude Haiku 5.5 is 3 months newer than Grok 4.5.
Oct 7, 2026
1 weeks ago
2mo newerJul 16, 2026
3 months ago
Knowledge Cutoff
When training data ends
Claude Haiku 5.5 has a knowledge cutoff of 2026-06-01, while Grok 4.5 has a cutoff of 2026-02-01.
Claude Haiku 5.5 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Grok 4.5 (2026-02-01).
Jun 2026
4 mo newerFeb 2026
Provider Availability
Claude Haiku 5.5 is available from Anthropic. Grok 4.5 is available from xAI.
Claude Haiku 5.5
Grok 4.5
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Haiku 5.5 and Grok 4.5 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Haiku 5.5 vs Grok 4.5.