Anthropic
Anthropic's fastest current Claude model, designed for high-volume and latency-sensitive workloads with near-frontier intelligence at its lowest current API price point.
OpenRouter
Price record: 2026-10-03. Source: openrouter.
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26.6
Quality Score
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Arena ELO
Undisclosed
Parameters
200K
Context
This measures the amount of verifiable public evidence we have, not how capable the model is. A missing field means it has not been verified yet, not that its value is zero.
16 of 22 public signals
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
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Oct 2025
Released
4/5 signals
3/4 signals
5/5 signals
1/4 signals
3/4 signals
Parameters
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Training compute
Not reported
Dataset scale
Not reported
Base model
Not reported
Source-reported access: API access · Unknown confidence
Gaps we are still tracking
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
claude-haiku-4-5-20251001 - SWE-Bench Verified
SWE-Bench Verified resolved rate 66.6
View sourceclaude-haiku-4-5 - GAIA
GAIA score 23.6 from haiku-4.5-s1-react
View sourceclaude-haiku-4-5-20251001 - SWE-Bench Verified
SWE-Bench Verified resolved rate 66.6
View sourceclaude-haiku-4-5-20251001 - SWE-Bench Verified
SWE-Bench Verified resolved rate 66.6
View sourceIntroducing Claude Haiku 4.5
Five months ago, Claude Sonnet 4 was a state-of-the-art model. Today, Claude Haiku 4.5 gives you similar levels of coding performance but at one-third the cost and more than twice the speed. Users who rely on AI for real-time, low-latency tasks like chat assistants, customer service agents, or pair programming will appreciate Haiku 4.5’s combination of high intelligence and remarkable speed.
View sourceIntroducing Claude Haiku 4.5
Five months ago, Claude Sonnet 4 was a state-of-the-art model. Today, Claude Haiku 4.5 gives you similar levels of coding performance but at one-third the cost and more than twice the speed. Users who rely on AI for real-time, low-latency tasks like chat assistants, customer service agents, or pair programming will appreciate Haiku 4.5’s combination of high intelligence and remarkable speed.
View source