Anthropic launches Claude Opus 4.7, migration advice

Anthropic said Claude Opus 4.7 is generally available, but the direct upgrade from Opus 4.6 may burn more tokens.

Like most model releases, Anthropic outlined benchmarks and Opus 4.7 performance across multiple tasks. But Anthropic also outlined the following:

"Opus 4.7 is a direct upgrade to Opus 4.6, but two changes are worth planning for because they affect token usage. First, Opus 4.7 uses an updated tokenizer that improves how the model processes text. The tradeoff is that the same input can map to more tokens—roughly 1.0–1.35× depending on the content type. Second, Opus 4.7 thinks more at higher effort levels, particularly on later turns in agentic settings. This improves its reliability on hard problems, but it does mean it produces more output tokens."

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Anthropic said customers can control token usage with parameters, adjusting task budgets or prompting the model to be more concise. Anthropic did say its own testing has found the net effect on token usage if favorable. The company also published a migration guide with more advice.

The migration guide that goes with Claude Opus 4.7 shows how token consumption is being more closely watched and there can be hiccups in LLM upgrades.

As for the performance, Opus 4.7 performs better than Opus 4.6 on advanced software engineering, long-running tasks and verifying outputs. The model also has better vision and can see images in greater resolutions.

However, Opus 4.7 is less capable than the Claude Mythos that was released under Project Glasswing.