feat: add Avian as LLM provider

[avianion]

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

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[greptile-apps]

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]

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