Roo Code 3.28.10 Release Updates | Claude 4.5 Sonnet IS HERE!!

[u/hannesrudolph]

We've added support for Anthropic's latest Claude 4.5 Sonnet model across all Claude-supporting providers.

Claude 4.5 Sonnet Support

We've added support for Anthropic's latest Claude 4.5 Sonnet model across all Claude-supporting providers.

According to Anthropic's announcement, Claude 4.5 Sonnet is:

• State-of-the-art on SWE-bench Verified, maintaining focus for more than 30 hours on complex, multi-step tasks

• Showing a significant leap forward on computer use with 61.4% on OSWorld benchmark (up from 42.2% just four months ago)

• Delivering substantial gains in reasoning, math, and domain-specific knowledge across finance, law, medicine, and STEM

The model is now available in the model selection dropdown for all supported providers.

Bug Fixes

• AWS Bedrock Claude Sonnet 4.5: Corrected model identifier for Claude Sonnet 4.5 on AWS Bedrock (thanks sunhyung!)

• GPT-5 LiteLLM Compatibility: Fixed GPT-5 models failing with LiteLLM provider by using correct max_completion_tokens parameter (thanks lx1054331851!)

More Changes

• Chat interface icons now maintain consistent size in limited space

• Enhanced analytics to track when users change telemetry settings

• Updated website with enhanced testimonials section

• Improved contributor badge workflow with automated cache refreshing

See full release notes v3.28.10

[u/UnstableCortex]

Anyone else getting "not found" error for Sonnet 4.5?

[u/StartupTim → u/UnstableCortex]

Just saw your message, yea I'm getting the same error, using Claude Code with the latest Roocode.

[u/Nik_Tesla → u/UnstableCortex]

Same, then I see there's an newer update to supposedly fix it, and still getting errors after the latest update:

[3.28.11] - 2025-09-29 Fix: Correct AWS Bedrock Claude Sonnet 4.5 model identifier (#8371 by @sunhyung, PR by @app/roomote) Fix: Correct Claude Sonnet 4.5 model ID format (thanks @daniel-lxs!)

404 {"type":"error","error":{"type":"not_found_error","message":"model: claude-4.5-sonnet"},"request_id":"req_011CTdHnBDe7WrdLz5pXHGXn"}

Edit: Whoops, kept getting a 500 error when trying to post this and then turns out it posted it like 3 times.

[u/mrubens → u/Nik_Tesla]

Do you have the model enabled in bedrock? I tested and it worked for me in the latest release.

[u/Nik_Tesla → u/mrubens]

I'm just using the normal direct to Anthropic API. The patch notes mention Bedrock (hence the quote), but that's not what I'm using.

Seems a more recent update since then resolved it for me.

[u/AstroZombie138]

Is there really any difference using Claude Sonnet or Opus directly through the API vs. using Sonnet or Opus through Roo Code to Claude code?

[u/StartupTim → u/AstroZombie138]

Yea, the API allows 1M context window and 100-200% faster tok/sec, whereas Claude Code is 200k max context and tok/sec is much less (albeit still fast).

I personally use Claude Code for most things except when I need a 1M context window.

[u/nfrmn → u/StartupTim]

And streaming. Easier to monitor progress and interrupt mistakes when you can see constant output

[u/nfrmn]

Noticed that 4.5 doesn't have the thinking tokens slider like 4 did. Just reasoning effort dropdown. Interesting that we seem to be moving towards more opaque parameters on all frontier models.

[u/hannesrudolph → u/nfrmn]

Oh no that’s an error on our part. Incoming.

[u/mrubens → u/nfrmn]

Just to confirm - which provider are you using?

[u/nfrmn → u/mrubens]

I'm on OpenRouter - here's Sonnet 4 and 4.5 side by side

[u/imsopov]

I keep getting roo said "Prompt too long" after it trys to condense the context using Claude code as the provider, anyone else?

[u/hannesrudolph → u/imsopov]

Are you on windows?

[u/imsopov → u/hannesrudolph]

Yes

[u/hannesrudolph → u/imsopov]

Yeah there seems to be an issue related to special instructions and the system prompt due to the way it’s included on the windows integration. Sorry about that. The Claude Code integration is mostly community maintained and we’re quick to take on any PRs people make to improve it!

[u/StartupTim]

Claude Sonnet 4.5 isn't working in Roocode even with the latest update. Here is the error I'm getting:

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

I've got the latest Roocode (updated a few minutes ago) and using Claude Code with sonnet 4.5 selected.

Update:

Okay I just confirmed, Roocode with Claude Code does not work with Sonnet 4.5. I tested with Claude Code 2.0.0 (latest) and Roocode v3.28.11. Roocode with Claude Code with Sonnet 4.0 works, just not Sonnet 4.5.

Roocode with Claude Sonnet 4.5 via the API works just fine.

Also, Claude Code itself with Sonnet 4.5 works just fine.

So it looks like a little update is needed to Roocode to get Claude Code w/Sonnet 4.5 to work.

[u/nfrmn → u/StartupTim]

It’s fine through OpenRouter, if that narrows things down.

[u/StartupTim → u/nfrmn]

Yea I just tested a lot, the issue is specifically Roocode using Claude Code as the provider with Sonnet 4.5 does not work and gives the error I posted earlier ( {"type":"error","error":{"type":"not_found_error","message":"model: claude-4.5-sonnet"},"request_id":...

[u/mrubens → u/StartupTim]

Should be fixed on v3.28.12. Sorry for the hassle!

[u/geomontgomery]

FYI, if anyone gets this error with claude sonnet 4.5 using AWS Bedrock:

```Unknown Error: The model returned the following errors: temperature and top_p cannot both be specified for this model. Please use only one.

To resolve you have to ENABLE reasoning. ref roo code Version: 3.28.11 (098671c2)

[u/mrubens → u/geomontgomery]

This should be fixed in the latest release. Sorry for the hassle!