Claude Haiku 5.5 is now generally available in GitHub Copilot, with token pricing disclosed

What happened

GitHub has made Anthropic's new lightweight model, Claude Haiku 5.5, generally available (GA) in GitHub Copilot. It is aimed at high-volume, fast-turnaround work such as subagents, quick edits and terminal tasks. According to a community write-up by Simon Willison, pricing is $0.10 per million input tokens and $0.50 per million output tokens for prompts up to 100,000 tokens. Above 100,000 tokens the rates are five times higher, at $0.50/$2.50. The previous Haiku 4.5 was priced at $1/$5.

Provider claims

Anthropic says Haiku 5.5 is about 75% cheaper than Haiku 4.5 on average and is the first Haiku model with adjustable effort (reasoning intensity).

Why it matters

Just one day after launch, the model became a standard option in a major coding tool. It could change the cost structure of call-heavy workloads such as subagents.

Sources

• Official Claude Haiku 5.5 in GitHub Copilot GitHub
• Community Claude Haiku 5.5 Simon Willison
• Community Claude Haiku 5.5 GeekNews

Story thread

1. 2026-10-07 Anthropic launches small model Claude Haiku 5.5, available on Amazon Bedrock from day one
2. 2026-10-08 Claude Haiku 5.5 is now generally available in GitHub Copilot, with token pricing disclosed

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