Claude API alias update

Anthropic updated the Claude API aliases for different models, now including claude-opus-4-6, claude-sonnet-4-6, and claude-haiku-4-5.

Mar 22, 2026

At a glance

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Affected

Anthropic · claude-opus-4

SLA/Terms

Cost impact

Low · 0/5

Estimated from pricing and window changes

Migration pressure

Low · 0/5

No explicit deadline yet

Next step

Keep monitoring the official rollout

Do this first, then review field-level details

Impact summary

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Cost

Low

Score 0/50%

Quality

Low

Score 0/50%

Migration

Low

Score 0/50%

Reliability

Low

Score 0/50%

Compliance

Low

Score 1/520%

The update involves adding API aliases for various Claude models. This change does not appear to affect existing functionality but rather provides alternative names for accessing the models.

Changes

Review changed fields first, then decide whether you need full before/after values.

Before

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Claude API alias    claude-opus-4-6    claude-sonnet-4-6    claude-haiku-4-5

After

Claude API alias    claude-opus-4-6    claude-sonnet-4-6
claude-haiku-4-5

Sources

Each source focuses on what it confirms, without repeating the whole article.

docs

Anthropic Models Docs

Claude API alias claude-opus-4-6 claude-sonnet-4-6

Open

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