feat: add Avian as LLM provider by avianion · Pull Request #3369 · simstudioai/sim

avianion · 2026-02-27T04:44:00Z

Summary

Adds Avian as a new LLM provider. Avian is an OpenAI-compatible inference API offering competitive pricing on frontier models.

Models:

Model	Context Window	Input (per 1M)	Output (per 1M)
deepseek/deepseek-v3.2	164K	$0.26	$0.38
moonshotai/kimi-k2.5	131K	$0.45	$2.20
z-ai/glm-5	131K	$0.30	$2.55
minimax/minimax-m2.5	1M	$0.30	$1.10

Features supported:

Chat completions
Streaming responses
Function/tool calling
Temperature control

Changes

components/icons.tsx — Add AvianIcon SVG component
providers/types.ts — Add 'avian' to ProviderId union type
providers/models.ts — Add Avian provider definition with model pricing and capabilities
providers/avian/index.ts — Provider implementation using OpenAI SDK (follows DeepSeek pattern)
providers/avian/utils.ts — Streaming utility using shared createOpenAICompatibleStream
providers/registry.ts — Register avianProvider in the provider registry
providers/utils.ts — Add Avian to provider metadata map

Implementation

The provider follows the same pattern as other OpenAI-compatible providers (DeepSeek, Cerebras). It uses the openai npm package with baseURL: 'https://api.avian.io/v1' and supports all standard features including tool calling loops, forced tool usage, and streaming with cost tracking.

Authentication is via user-provided API key (AVIAN_API_KEY as Bearer token).

Test plan

Verify Avian models appear in model selector dropdown
Test chat completion with deepseek/deepseek-v3.2 model
Test streaming response
Test function calling with a tool-enabled workflow
Verify cost tracking displays correct pricing

cc @waleedlatif1 @emir-karabeg

Add Avian (https://avian.io) as a new LLM provider with OpenAI-compatible API support including chat completions, streaming, and function calling. Models: - deepseek/deepseek-v3.2 (164K context, $0.26/$0.38 per 1M tokens) - moonshotai/kimi-k2.5 (131K context, $0.45/$2.20 per 1M tokens) - z-ai/glm-5 (131K context, $0.30/$2.55 per 1M tokens) - minimax/minimax-m2.5 (1M context, $0.30/$1.10 per 1M tokens) Changes: - Add AvianIcon to components/icons.tsx - Add 'avian' to ProviderId type - Add Avian provider definition with model pricing in models.ts - Create providers/avian/ with index.ts and utils.ts - Register provider in registry.ts and utils.ts

vercel · 2026-02-27T04:44:04Z

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greptile-apps · 2026-02-27T04:46:49Z

Greptile Summary

Added Avian as a new LLM provider with OpenAI-compatible API integration. The implementation follows the established DeepSeek provider pattern, reusing proven architecture for OpenAI SDK-based providers. The integration includes proper tool calling support, streaming responses, cost tracking, and provider metadata registration. All 4 models are correctly configured with pricing and context window specifications.

Confidence Score: 5/5

This PR is safe to merge with no concerns
The implementation is a well-executed pattern replication of the existing DeepSeek provider with appropriate naming changes. All imports follow established conventions, model definitions are accurate, and the provider is properly registered across all necessary files. No logic changes or risks introduced.
No files require special attention

Important Files Changed

Filename	Overview
apps/sim/providers/avian/index.ts	New provider implementation following established DeepSeek pattern with OpenAI SDK, supports tool calling, streaming, and cost tracking
apps/sim/providers/models.ts	Added Avian provider definition with 4 models, pricing, and configuration
apps/sim/providers/registry.ts	Registered `avianProvider` in the provider registry map
apps/sim/providers/types.ts	Added `'avian'` to `ProviderId` union type
apps/sim/providers/utils.ts	Added Avian to provider metadata map using `buildProviderMetadata`

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[User selects Avian provider] --> B[Provider Registry]
    B --> C[avianProvider from /providers/avian/index.ts]
    C --> D[Initialize OpenAI SDK]
    D --> E[baseURL: api.avian.io/v1]
    E --> F{Request Type?}
    F -->|Streaming + No Tools| G[Create stream response]
    F -->|With Tools| H[Tool execution loop]
    F -->|Standard| I[Standard completion]
    H --> J[Execute tools with prepareToolsWithUsageControl]
    J --> K[Track forced tool usage]
    K --> L[Iterate up to MAX_TOOL_ITERATIONS]
    L --> M{Stream final?}
    M -->|Yes| G
    M -->|No| N[Return response with timing]
    G --> O[Calculate costs using model pricing]
    I --> O
    N --> O
    O --> P[Return to user with tokens & cost]

_{Last reviewed commit: f77f80c}

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_{7 files reviewed, no comments}

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avianion · 2026-03-05T06:14:02Z

Friendly follow-up — this PR is still active and ready for review. Would appreciate a look when you get a chance! cc @waleedlatif1 @emir-karabeg

avianion · 2026-03-05T06:18:09Z

Friendly follow-up — this PR is still active and ready for review. All feedback has been addressed. Would appreciate a look when you get a chance! cc @waleedlatif1

avianion · 2026-03-05T08:37:09Z

Hey @waleedlatif1 @emir-karabeg — friendly follow-up on this PR. Avian is an OpenAI-compatible inference provider that's already live and powering apps like ISEKAI ZERO. This is a lightweight integration (standard OpenAI-compatible endpoint) and we're happy to address any feedback or make adjustments. Would love to get this merged if you have a moment to review. Thanks!

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cursor · 2026-03-08T23:54:15Z

PR Summary

Medium Risk
Adds a new third-party inference provider with streaming + tool-calling execution paths and registers it across provider selection/metadata, which could affect runtime behavior if request/response formatting differs from other OpenAI-compatible backends.

Overview
Adds Avian as a new LLM provider, including a full provider implementation (providers/avian) that uses the OpenAI SDK against https://api.avian.io/v1 and supports non-streaming, streaming, and iterative tool-calling with cost/timing tracking.

Wires Avian into the app by adding an AvianIcon, defining Avian models/pricing/capabilities in providers/models.ts, and registering 'avian' in provider types, provider registry, and client-safe provider metadata.

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vercel · 2026-03-08T23:54:17Z

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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cursor · 2026-03-08T23:56:05Z

apps/sim/providers/avian/index.ts

+      })
+    }
+  },
+}


~560-line provider duplicates DeepSeek implementation verbatim

Low Severity

The entire avian/index.ts (~560 lines) is a near-verbatim copy of deepseek/index.ts, differing only in the provider name string and base URL. The avian/utils.ts wrapper is also a trivial one-liner delegating to createOpenAICompatibleStream, identical in structure to deepseek/utils.ts, groq/utils.ts, etc. Given that a shared createOpenAICompatibleStream utility and checkForForcedToolUsageOpenAI helper already exist in providers/utils.ts, this full duplication increases maintenance burden — any future bug fix to the tool-calling loop, streaming, or cost tracking logic needs to be replicated across every copy-pasted provider.

Additional Locations (1)

apps/sim/providers/avian/utils.ts#L1-L14

greptile-apps bot reviewed Feb 27, 2026

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chore: merge upstream main to bring branch up to date

f3ba0e7

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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feat: add Avian as LLM provider#3369

feat: add Avian as LLM provider#3369
avianion wants to merge 2 commits intosimstudioai:mainfrom
avianion:feat/avian-provider

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avianion commented Feb 27, 2026

Summary

Changes

Implementation

Test plan

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Greptile Summary

Confidence Score: 5/5

Important Files Changed

Flowchart

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~560-line provider duplicates DeepSeek implementation verbatim

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