[BUG] Sonnet 4.5 w/ Anthropic provider returning 404

[jacob-long]

Problem (one or two sentences)

When choosing the newly-added Sonnet 4.5 from the Anthropic provider in Roo, it gets a 404 message, e.g.,

404 {"type":"error","error":{"type":"not_found_error","message":"model: claude-4.5-sonnet"},"

Context (who is affected and when)

Anyone selecting Claude 4.5 Sonnet from the dropdown with the Anthropic provider.

Reproduction steps

Roo Code 3.28.11, select Claude 4.5 Sonnet from the dropdown with Anthropic provider, try to send a message.

Expected result

Normal API response

Actual result

404 error response

Variations tried (optional)

No response

App Version

3.28.11

API Provider (optional)

Anthropic

Model Used (optional)

Claude 4.5 Sonnet

Roo Code Task Links (optional)

No response

Relevant logs or errors (optional)

The problem appears to be the use of the wrong model identifier. The error indicates that Roo is sending `claude-4.5-sonnet`, when it should be `claude-sonnet-4-5`.

[roomote]

I'm exploring a potential fix for the incorrect model identifier issue. The problem appears to be that the code is using 'claude-4.5-sonnet' instead of the correct 'claude-sonnet-4-5' format. I'll investigate and open a PR to share progress.

[Chipsnet]

{"type":"error","error":{"type":"not_found_error","message":"model: claude-4.5-sonnet"},"request_id":"******************"}

Retry attempt 1
Retrying in 4 seconds...

The same error also occurs with the Claude Code Provider.

[roomote]

I've opened PR #8380 with a fix for this issue: #8380

The fix maps the internal model ID 'claude-4.5-sonnet' to the Anthropic API-expected format 'claude-sonnet-4-5'. All CI checks have passed successfully. Feedback welcome!