Add Bedrock Devstral 2

[emerzon]

Adds Bedrock Devstral 2 DB entries

Pre-Submission checklist

Please complete all items before asking a LiteLLM maintainer to review your PR

• I have Added testing in the tests/litellm/ directory, Adding at least 1 test is a hard requirement - see details
• My PR passes all unit tests on make test-unit
• My PR's scope is as isolated as possible, it only solves 1 specific problem
• I have requested a Greptile review by commenting @greptileai and received a Confidence Score of at least 4/5 before requesting a maintainer review

CI (LiteLLM team)

CI status guideline:

• 50-55 passing tests: main is stable with minor issues.
• 45-49 passing tests: acceptable but needs attention
• <= 40 passing tests: unstable; be careful with your merges and assess the risk.

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Type

🆕 New Feature

Changes

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Project	Deployment	Actions	Updated (UTC)
litellm	Error		Feb 22, 2026 2:26am

[greptile-apps]

Greptile Summary

This PR adds Bedrock Devstral 2 (123B) model definitions across three files. It registers mistral.devstral-2-123b in the BEDROCK_CONVERSE_MODELS list in litellm/constants.py, and adds pricing/capability entries for 12 AWS regions plus a base entry in both JSON pricing files (which are kept in sync).

• Pricing entries include standard, flex, and priority tiers with region-specific cost variations (e.g., us-east-1/us-west-2 are cheaper than eu-west-2)
• Model is configured with 256K context window for both input and output, using bedrock_converse provider
• Supports function calling, tool choice, response schema, and assistant prefill
• No tests were added with this PR — per the pre-submission checklist, at least 1 test in tests/litellm/ is a hard requirement

Confidence Score: 4/5

• This PR is safe to merge — it only adds new model metadata entries with no behavioral code changes.
• The changes are purely additive model pricing/config entries following established patterns. Both JSON files are in sync, the model is correctly registered in BEDROCK_CONVERSE_MODELS, and the litellm_provider is correctly set to bedrock_converse. Minor style note: the entries omit supports_system_messages which other Mistral models include, but this defaults to None and is not a functional issue.
• No files require special attention — all changes are straightforward data entries.

Important Files Changed

Filename	Overview
litellm/constants.py	Adds mistral.devstral-2-123b to the BEDROCK_CONVERSE_MODELS list. Correctly placed among other Mistral models. No issues found.
model_prices_and_context_window.json	Adds pricing/config entries for mistral.devstral-2-123b across 12 AWS regions plus a base entry. Entries include flex/priority pricing tiers, consistent structure, and correct bedrock_converse provider. Missing supports_system_messages flag that other Mistral models include.
litellm/model_prices_and_context_window_backup.json	Identical changes to model_prices_and_context_window.json (backup copy). Both files are in sync. Same minor observation about missing supports_system_messages.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["User calls litellm.completion(model='bedrock/us-east-1/mistral.devstral-2-123b')"] --> B["get_llm_provider_logic.py\nResolves provider as 'bedrock'"]
    B --> C["bedrock/common_utils.py\nChecks BEDROCK_CONVERSE_MODELS"]
    C --> D{"Is model in\nbedrock_converse_models?"}
    D -->|Yes| E["Route to Bedrock Converse API"]
    D -->|No| F["Route to Bedrock Invoke API"]
    E --> G["model_prices_and_context_window.json\nLookup pricing & capabilities"]
    G --> H["Return response with\ncost tracking"]

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_{Last reviewed commit: fa102a9}

[greptile-apps]

_{3 files reviewed, 1 comment}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

Missing supports_system_messages flag

Other Mistral bedrock_converse models (e.g., mistral.magistral-small-2509, mistral.ministral-3-14b-instruct) include "supports_system_messages": true. This entry omits it. While it defaults to None and won't cause a runtime error, adding it would maintain consistency and ensure system messages are correctly handled for this model.

Suggested change

	"supports_assistant_prefill": true,
	"supports_function_calling": true,
	"supports_response_schema": true,
	"supports_tool_choice": true
	"supports_assistant_prefill": true,
	"supports_function_calling": true,
	"supports_response_schema": true,
	"supports_system_messages": true,
	"supports_tool_choice": true

_{Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!}

[Copilot]

Pull request overview

Adds pricing/context-window metadata for the Bedrock-hosted Mistral Devstral 2 123B model so LiteLLM can compute costs and route requests correctly (via bedrock_converse).

Changes:

• Added regional Bedrock pricing entries for mistral.devstral-2-123b across multiple AWS regions.
• Added a base (non-region) model entry mistral.devstral-2-123b for default lookups.
• Registered mistral.devstral-2-123b in BEDROCK_CONVERSE_MODELS so it’s recognized as a Converse-routed Bedrock model.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
model_prices_and_context_window.json	Adds Devstral 2 123B pricing + limits + capability flags (regional + base entry).
litellm/model_prices_and_context_window_backup.json	Keeps the backup JSON in sync with the main pricing file.
litellm/constants.py	Adds the model ID to BEDROCK_CONVERSE_MODELS for Bedrock Converse routing/recognition.

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