[ENHANCEMENT] Add Kimi K2.5 to Fireworks

[nakamorichi]

Problem (one or two sentences)

Add Kimi K2.5 support to Fireworks AI provider.

Context (who is affected and when)

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Desired behavior (conceptual, not technical)

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Constraints / preferences (optional)

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Request checklist

• I've searched existing Issues and Discussions for duplicates
• This describes a specific problem with clear context and impact

Roo Code Task Links (optional)

No response

Acceptance criteria (optional)

No response

Proposed approach (optional)

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Trade-offs / risks (optional)

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[roomote]

I would like to help with this issue, but I need some information about the Kimi K2.5 model to implement it correctly.

I found where Fireworks models are defined in the codebase (packages/types/src/providers/fireworks.ts). The existing Kimi K2 models (kimi-k2-instruct, kimi-k2-instruct-0905, kimi-k2-thinking) are already supported.

Could you please provide the following specifications for Kimi K2.5:

1. Fireworks Model ID - The exact model identifier (e.g., accounts/fireworks/models/kimi-k2p5-instruct)
2. Max output tokens - Maximum tokens the model can generate in a response
3. Context window size - Total context window in tokens
4. Image support - Does it support image inputs? (true/false)
5. Prompt cache support - Does it support prompt caching? (true/false)
6. Pricing - Input price and output price per million tokens (and cache reads price if applicable)
7. Special properties - Any special configurations like reasoning mode, default temperature, etc.
8. Description - A brief description of the model capabilities

Proposed implementation plan:

1. Add the new model ID to the FireworksModelId type union in packages/types/src/providers/fireworks.ts
2. Add the model configuration to the fireworksModels object with all the specifications above
3. Update the test file src/api/providers/__tests__/fireworks.spec.ts to include tests for the new model
4. Run tests to verify everything works correctly

Please mention @roomote in a comment with the model specifications, and I'll proceed with the implementation.

[nakamorichi]

@roomote Created PR: #11035

[roomote]

Thanks for creating the PR! I've reviewed PR #11035 and it looks like a solid implementation for adding Kimi K2.5 support. The model configuration includes all the key details (context window, pricing, image support, etc.).

One minor observation: the PR also changes the default Fireworks model from kimi-k2-instruct-0905 to kimi-k2p5. This might be intentional but could be a breaking change for users relying on the current default. Worth considering if this should be a separate discussion.

Thank you for the contribution!