Claude 3.5 Haiku vs Claude Haiku 4.5
Claude Haiku 4.5 leads the LLM Stats Score 25.6 to 5.2. Claude 3.5 Haiku is 1.3x cheaper per token.
Anthropic · Anthropic · Updated for 2026
Which is better?
Claude Haiku 4.5 leads the overall LLM Stats Score 25.6 to 5.2, ranking #171 overall.
In the 2 individual benchmarks reported for both models, Claude Haiku 4.5 wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Claude 3.5 Haiku is roughly 1.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude 3.5 Haiku
- cost matters — it's about 1.3x cheaper per token
Choose Claude Haiku 4.5
- overall performance matters — it scores 25.6 and ranks #171 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you want the most recent training data — it shipped Oct 2025
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for Claude 3.5 Haiku · 12 for Claude Haiku 4.5
Claude 3.5 Haiku outperforms in 0 benchmarks, while Claude Haiku 4.5 is better at 2 benchmarks (GPQA, SWE-Bench Verified).
Claude Haiku 4.5 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 3.5 Haiku ($0.80/1M tokens) is 1.3x cheaper than Claude Haiku 4.5 ($1.00/1M tokens).
For output processing, Claude 3.5 Haiku ($4.00/1M tokens) is 1.3x cheaper than Claude Haiku 4.5 ($5.00/1M tokens).
In conclusion, Claude Haiku 4.5 is more expensive than Claude 3.5 Haiku.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 200,000 tokens. Claude 3.5 Haiku can generate longer responses up to 200,000 tokens, while Claude Haiku 4.5 is limited to 64,000 tokens.
Input capabilities
Documented input modalities across available providers
Claude Haiku 4.5 supports multimodal inputs, whereas Claude 3.5 Haiku does not.
Claude Haiku 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude 3.5 Haiku
Claude Haiku 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 3.5 Haiku was released on 2024-10-22, while Claude Haiku 4.5 was released on 2025-10-15.
Claude Haiku 4.5 is 12 months newer than Claude 3.5 Haiku.
Oct 22, 2024
2.0 years ago
Oct 15, 2025
1.0 years ago
11mo newerKnowledge Cutoff
When training data ends
Claude Haiku 4.5 has a documented knowledge cutoff of 2025-02-01, while Claude 3.5 Haiku's cutoff date is not specified.
We can confirm Claude Haiku 4.5's training data extends to 2025-02-01, but cannot make a direct comparison without Claude 3.5 Haiku's cutoff date.
—
Feb 2025
Provider Availability
Claude 3.5 Haiku is available from Bedrock, Google, Anthropic. Claude Haiku 4.5 is available from Anthropic, DeepInfra, Vertex AI.
Claude 3.5 Haiku
Claude Haiku 4.5
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3.5 Haiku and Claude Haiku 4.5 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3.5 Haiku vs Claude Haiku 4.5.