Claude Opus 4 Model Details Update

Anthropic updated the documentation for Claude Opus 4, adding details on max output tokens, knowledge cutoff, and training data cutoff for different models.

Apr 26, 2026

At a glance

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

Affected

Anthropic · claude-opus-4

New Launch

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

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

Cost

Low

Score 0/50%

Quality

Low

Score 1/520%

Migration

Low

Score 0/50%

Reliability

Low

Score 1/520%

Compliance

Low

Score 0/50%

The update provides more specific information about model capabilities but does not change existing functionality.

Changes

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

Before

If you&#x27;re unsure which model to use, consider starting with  Claude Opus 4.7  for the most complex tasks. It is our most capable generally available model, with a step-change improvement in agentic coding over Claude Opus 4.6.
All current Claude models support text and image input, text output, multilingual capabilities, and vision. Models are available via the Claude API, Amazon Bedrock, Vertex AI, and Microsoft Foundry.
Once you&#x27;ve picked a model,  learn how to make your first API call .
Feature  Claude Opus 4.7  Claude Sonnet 4.6  Claude Haiku 4.5
Description   Our most capable generally available model for complex reasoning and agentic coding  The best combination of speed and intelligence  The fastest model with near-frontier intelligence
Claude API ID    claude-opus-4-7    claude-sonnet-4-6    claude-haiku-4-5-20251001
Claude API alias    claude-opus-4-7    claude-sonnet-4-6    claude-haiku-4-5
AWS Bedrock ID    anthropic.claude-opus-4-7  3    anthropic.claude-sonnet-4-6    anthropic.claude-haiku-4-5-20251001-v1:0
GCP Vertex AI ID    claude-opus-4-7    claude-sonnet-4-6    claude-haiku-4-5@20251001
Pricing  1   $5 / input MTok
$25 / output MTok  $3 / input MTok
$15 / output MTok  $1 / input MTok

After

self.__next_f.push([1,"59:[\"$\",\"tr\",null,{\"className\":\"border-b-0.5 border-border-400 last:border-b-0\",\"children\":[[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":[\"$\",\"strong\",null,{\"className\":\"font-semibold\",\"children\":\"Max output\"}]}],[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":\"128k tokens\"}],[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":\"64k tokens\"}],[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":\"64k tokens\"}]]}]\n5a:[\"$\",\"tr\",null,{\"className\":\"border-b-0.5 border-border-400 last:border-b-0\",\"children\":[[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":[\"$\",\"strong\",null,{\"className\":\"font-semibold\",\"children\":\"Reliable knowledge cutoff\"}]}],[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":[\"Jan 2026\",[\"$\",\"sup\",null,{\"children\":\"2\"}]]}],[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":[\"Aug 2025\",[\"$\",\"sup\",null,{\"children\":\"2\"}]]}],[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":\"Feb 2025\"}]]}]\n5b:[\"$\",\"tr\",null,{\"className\":\"border-b-0.5 border-border-400 last:border-b-0\",\"children\":[[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-200\",\"children\":[\"$\",\"strong\",null,{\"className\":\"font-semibold\",\"children\":\"Training data cutoff

Sources

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

docs

Anthropic Models Docs

self.__next_f.push([1,"59:[\"$\",\"tr\",null,{\"className\":\"border-b-0.5 border-border-400 last:border-b-0\",\"children\":[[\"$\",\"td\",null,{\"className\":\"p-2 first:pl-0 last:pr-0 text-text-2...

Open

Comments

Loading comments...