Claude 3.5 Sonnet vs Claude Haiku 5.5
Claude Haiku 5.5 leads the LLM Stats Score 50.3 to 19.0. Claude Haiku 5.5 is 30.0x cheaper per token.
Anthropic · Anthropic · Updated for 2026
Which is better?
Claude Haiku 5.5 leads the overall LLM Stats Score 50.3 to 19.0, ranking #18 overall.
On price, Claude Haiku 5.5 is roughly 30.0x 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 3.5 Sonnet
- you want predictable pricing at $3.00/M input and $15.00/M output
Choose Claude Haiku 5.5
- overall performance matters — it scores 50.3 and ranks #18 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- cost matters — it's about 30.0x 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
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
19 reported for Claude 3.5 Sonnet · 36 for Claude Haiku 5.5
Claude 3.5 Sonnet and Claude Haiku 5.5don'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
Pricing Analysis
Price comparison per million tokens
For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 30.0x more expensive than Claude Haiku 5.5 ($0.10/1M tokens).
For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 30.0x more expensive than Claude Haiku 5.5 ($0.50/1M tokens).
In conclusion, Claude 3.5 Sonnet 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 Claude 3.5 Sonnet's 200,000 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while Claude Haiku 5.5 is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude 3.5 Sonnet and Claude Haiku 5.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude 3.5 Sonnet
Claude Haiku 5.5
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 3.5 Sonnet was released on 2024-10-22, while Claude Haiku 5.5 was released on 2026-10-07.
Claude Haiku 5.5 is 24 months newer than Claude 3.5 Sonnet.
Oct 22, 2024
2.0 years ago
Oct 7, 2026
0 days ago
2.0yr newerKnowledge Cutoff
When training data ends
Claude Haiku 5.5 has a documented knowledge cutoff of 2026-06-01, while Claude 3.5 Sonnet'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 Claude 3.5 Sonnet's cutoff date.
—
Jun 2026
Provider Availability
Claude 3.5 Sonnet is available from Anthropic, Bedrock, Google. Claude Haiku 5.5 is available from Anthropic.
Claude 3.5 Sonnet
Claude Haiku 5.5
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3.5 Sonnet and Claude Haiku 5.5 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3.5 Sonnet vs Claude Haiku 5.5.