# Claude Opus 5 is now available

By Steven Van · 2026-08-18

Choosing Opus 5 manually, instead of Auto mode, needs a Builder plan or higher, for both the AI chat and the Superagent.

[Base44](<https://creatorstoolbox.com/tools/base44>) has added Claude Opus 5 as a model option in both the AI chat and the Superagent's model picker. Base44 describes it as its most advanced reasoning model, suited to complex multi-step logic, intricate architecture decisions, and edge cases where the highest accuracy is needed. Picking a model by hand, rather than leaving it to Auto mode, requires the **Builder plan** or higher, as covered in the [AI chat documentation](<https://docs.base44.com/Building-your-app/AI-chat-modes>).

![The model menu open in the AI chat, listing the available models with AI Controls highlighted under Preferences](<https://mintcdn.com/base44/Fe1EUhgmdxe2q9Xg/images/ai-controls.png?fit=max&auto=format&n=Fe1EUhgmdxe2q9Xg&q=85&s=0bafa0faf9d7d67b73388c5b794cc130>)

The model menu in the AI chat, listing available models including Opus 5

![The model selector open below the prompt box on the Base44 homepage, showing Auto mode, Base 1, Sonnet 5, Opus 5, GPT-5.6 Terra, GPT-5.6 Sol, and Fable 5.1](<https://mintcdn.com/base44/Fe1EUhgmdxe2q9Xg/images/ai-model-first-prompt.png?fit=max&auto=format&n=Fe1EUhgmdxe2q9Xg&q=85&s=ff4c362c11cd32b684c07e91577858f8>)

The model picker on the homepage, listing Opus 5 among the available models

![The model selector open in the app editor, showing Auto mode, Base 1, Sonnet 5, Opus 5, GPT-5.6 Terra, GPT-5.6 Sol, and Fable 5.1](<https://mintcdn.com/base44/Fe1EUhgmdxe2q9Xg/images/model-ai-picker.png?fit=max&auto=format&n=Fe1EUhgmdxe2q9Xg&q=85&s=e575dbf69dc874e037095bff39a65f3b>)

The model picker in the app editor, listing Opus 5 among the available models

![Base44](<https://www.google.com/s2/favicons?domain=base44.com&sz=128>)

Base44

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[View Base44 →](<https://creatorstoolbox.com/tools/base44>)

Sources

[Original source](<https://docs.base44.com/Building-your-app/AI-chat-modes>)

[Read Claude Opus 5 is now available on Creators Toolbox](<https://creatorstoolbox.com/blog/base44-claude-opus-5-is-now-available>)

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Canonical source: https://creatorstoolbox.com/blog/base44-claude-opus-5-is-now-available