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Anthropic reports a long-running language migration evaluated against an existing regression suite.
What the source shows
The launch material describes an HAProxy migration from C to Rust, reporting approximately 9.5 hours for Opus 5.5 and nearly all regression tests passing. The description provides a task-specific result rather than a general guarantee about migrations.
What to inspect
Check behavioral compatibility before comparing syntax or code volume. Identify the tests that failed, the features outside their coverage and whether performance or memory use changed. A passing suite can still miss operational differences.
A useful way to try this
Choose a small component with a stable interface. Freeze a reference implementation and create a differential test harness before asking for a translation. Review unsafe code and failure paths explicitly. Track the model’s retries and total token cost.
Evidence and limitations
This is a vendor-published report, not an AI IDE List benchmark. The underlying environment and complete execution transcript are not available in this listing. The evidence panel above records the source type, settings and prompt attribution. AI IDE List has not independently reproduced this result.
Explore Claude Opus 5.5 examples or compare model specifications and costs.
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