Claude Sonnet 4 Pricing Update

Anthropic updated the pricing information for Claude Sonnet 4. The changes reflect modifications in how pricing details are presented, potentially indicating a change in cost structure or billing.

Apr 27, 2026

At a glance

Decide impact, cost movement, and the next step before reading the full diff.

Affected

Anthropic · claude-sonnet-4

Pricing Change

Cost impact

Medium · 2/5

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

Use explicit levels instead of abstract charts to judge this change.

Cost

Medium

Score 2/540%

Quality

Low

Score 0/50%

Migration

Low

Score 0/50%

Reliability

Low

Score 0/50%

Compliance

Low

Score 0/50%

The update may affect cost calculations for users of Claude Sonnet 4.

Changes

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

Before

self.__next_f.push([1,"3b:[\"$\",\"tr\",null,{\"className\":\"border-b-0.5 border-border-400 last:border-b-0\",\"children\":[[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":[[\"$\",\"strong\",null,{\"className\":\"font-semibold\",\"children\":\"Pricing\"}],[\"$\",\"sup\",null,

After

self.__next_f.push([1,"37:[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":[\"$\",\"$L36\",null,{\"id\":\"claude-sonnet-4-6\"}]}]\n38:[\"$\",\"td\",null,{\

Sources

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

docs

Anthropic Models Docs

self.__next_f.push([1,"37:[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":[\"$\",\"$L36\",null,{\"id\":\"claude-sonnet-4-6\"}]}]\n38:[\"$\",\"td\",null,{\

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