Model Tracker

Claude Haiku 4.5

Claude Haiku 4.5 is an AI model made by Anthropic. Anthropic released it on 15 October 2025. It is generally available. It takes text, image and returns text.

Anthropic

Claude Haiku 4.5 is an AI model made by Anthropic. Anthropic released it on 15 October 2025. It is generally available. It takes text, image and returns text. Its context window is 200,000 tokens. Its longest answer is 64,000 tokens. Through the API it costs $1.00 per 1M tokens for input and $5.00 per 1M tokens for output. Its knowledge cutoff is February 2025.

Released: 15 October 2025 — platform.claude.com, read 16 October 2026
Status: Generally available — platform.claude.com, read 16 October 2026
Takes: Text, Image — platform.claude.com, read 16 October 2026
Returns: Text — platform.claude.com, read 16 October 2026
Open weights: Not confirmed: The official model page, system card, and release announcement reviewed do not state whether the model’s weights are open or downloadable.
Licence: Not confirmed: The official model page, system card, and release announcement reviewed do not name a licence for the model.
Context window: 200,000 tokens — platform.claude.com, read 16 October 2026
Longest answer: 64,000 tokens — platform.claude.com, read 16 October 2026
Knowledge cutoff: February 2025 — platform.claude.com, read 16 October 2026
API price, input: $1.00 per 1M tokens — platform.claude.com, read 16 October 2026
API price, output: $5.00 per 1M tokens — platform.claude.com, read 16 October 2026
Where: API, Consumer app, Cloud marketplaces — www.anthropic.com, read 16 October 2026
Parameters: Not confirmed: The official model page, system card, and release announcement reviewed do not publish a parameter count.
Model card: Not confirmed: two readings disagree: https://assets.anthropic.com/m/99128ddd009bdcb/original/Claude-Haiku-4-5-System-Card.pdf and https://www.anthropic.com/claude-haiku-4-5-system-card

Benchmarks

Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.

Arena

Text Arena, claude-haiku-4-5-20251001: 1,414 (1,412–1,417, 149,199 votes), published 15 October 2026

Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0

Epoch AI

Epoch Capabilities Index, Claude Haiku 4.5: 142.4 (139.3–144.1), as of 19 October 2026
GPQA Diamond, claude-haiku-4-5-20251001_32K: 71.2% (± 3.2), run 22 October 2025
GPQA Diamond, claude-haiku-4-5-20251001: 60.5% (± 2.8), run 16 October 2025
OTIS Mock AIME 2024–2025, claude-haiku-4-5-20251001_32K: 66.7% (± 7.1), run 22 October 2025
OTIS Mock AIME 2024–2025, claude-haiku-4-5-20251001: 35.8% (± 6.2), run 16 October 2025
SimpleQA Verified, claude-haiku-4-5-20251001: 13.2% (± 1.1), run 10 August 2026
SimpleQA Verified, claude-haiku-4-5-20251001_32K: 12.6% (± 1.0), run 27 August 2026

Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0

Questions

When was Claude Haiku 4.5 released?

Anthropic released Claude Haiku 4.5 on 15 October 2025.

Is Claude Haiku 4.5 still available?

Yes: it is generally available, as Anthropic states it.

What is the context window of Claude Haiku 4.5?

The context window of Claude Haiku 4.5 is 200,000 tokens, as Anthropic prints it.

How much does the Claude Haiku 4.5 API cost?

On the standard tier, Claude Haiku 4.5 costs $1.00 per 1M tokens for input and $5.00 per 1M tokens for output, as Anthropic lists it.

What does Claude Haiku 4.5 take and return?

Claude Haiku 4.5 takes text, image and returns text.

What is the knowledge cutoff of Claude Haiku 4.5?

The knowledge cutoff of Claude Haiku 4.5 is February 2025.

Sources

Claude Haiku 4.5 - Claude Platform Docs (read 16 October 2026)
Model deprecations - Claude Platform Docs (read 16 October 2026)
Introducing Claude Haiku 4.5 (read 16 October 2026)
Claude Haiku 4.5 System Card (read 16 October 2026)

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