Claude Sonnet 5

Price history

Anthropic made the introductory $2 input / $10 output rates permanent. Older benchmark charts may still calculate cost using $3 / $15.

Each source has its own history. We don’t join conflicting sources into a single price trend. Standard input prices exclude cache discounts.

When live checks began

These are the earliest and latest successful checks we can prove from our retained polling records. Reconstructing an older price never moves these timestamps backward.

A baseline of these monitoring records was preserved on 2026-09-18. The current checks below may be newer.

Launches & price changes

A reconstruction from dated sources. The effective date, publication date, and date we added the evidence are recorded separately. Coverage is incomplete; an absent event does not prove nothing changed.

Earlier launches and price changes have not been verified for this listing. The price chart above uses our recorded observations independently; daily collection does not wait for historical research.

Benchmarks

Results depend on reasoning effort, tools, and evaluation setup. Check the original report before comparing scores across models.