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feat: add OpenAI-compatible provider shim — use any LLM with Claude Code

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Adds a new 'openai' API provider that translates Anthropic SDK calls to
OpenAI chat completions format, enabling Claude Code's full tool system
(bash, file read/write/edit, grep, glob, agents) with any OpenAI-compatible
model: GPT-4o, DeepSeek, Gemini, Llama, Ollama, OpenRouter, and 200+ more.

Set CLAUDE_CODE_USE_OPENAI=1, OPENAI_API_KEY, and OPENAI_MODEL to use.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
did:key:z6MkqDnb7Siv3Cwj7pGJq4T5EsUisECqR8KpnDLwcaZq5TPr
2026-03-31 23:12:43 +08:00
parent d2542c9a62
commit 619b5fb603
6 changed files with 786 additions and 12 deletions
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22
src/utils/model/configs.ts
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@@ -3,6 +3,17 @@ import type { APIProvider } from './providers.js'
export type ModelConfig = Record<APIProvider, ModelName>
// ---------------------------------------------------------------------------
// OpenAI-compatible model mappings
// Maps Claude model tiers to sensible defaults for popular providers.
// Override with OPENAI_MODEL, ANTHROPIC_MODEL, or settings.model
// ---------------------------------------------------------------------------
export const OPENAI_MODEL_DEFAULTS = {
opus: 'gpt-4o', // best reasoning
sonnet: 'gpt-4o-mini', // balanced
haiku: 'gpt-4o-mini', // fast & cheap
} as const
// @[MODEL LAUNCH]: Add a new CLAUDE_*_CONFIG constant here. Double check the correct model strings
// here since the pattern may change.
@@ -11,6 +22,7 @@ export const CLAUDE_3_7_SONNET_CONFIG = {
bedrock: 'us.anthropic.claude-3-7-sonnet-20250219-v1:0',
vertex: 'claude-3-7-sonnet@20250219',
foundry: 'claude-3-7-sonnet',
openai: 'gpt-4o-mini',
} as const satisfies ModelConfig
export const CLAUDE_3_5_V2_SONNET_CONFIG = {
@@ -18,6 +30,7 @@ export const CLAUDE_3_5_V2_SONNET_CONFIG = {
bedrock: 'anthropic.claude-3-5-sonnet-20241022-v2:0',
vertex: 'claude-3-5-sonnet-v2@20241022',
foundry: 'claude-3-5-sonnet',
openai: 'gpt-4o-mini',
} as const satisfies ModelConfig
export const CLAUDE_3_5_HAIKU_CONFIG = {
@@ -25,6 +38,7 @@ export const CLAUDE_3_5_HAIKU_CONFIG = {
bedrock: 'us.anthropic.claude-3-5-haiku-20241022-v1:0',
vertex: 'claude-3-5-haiku@20241022',
foundry: 'claude-3-5-haiku',
openai: 'gpt-4o-mini',
} as const satisfies ModelConfig
export const CLAUDE_HAIKU_4_5_CONFIG = {
@@ -32,6 +46,7 @@ export const CLAUDE_HAIKU_4_5_CONFIG = {
bedrock: 'us.anthropic.claude-haiku-4-5-20251001-v1:0',
vertex: 'claude-haiku-4-5@20251001',
foundry: 'claude-haiku-4-5',
openai: 'gpt-4o-mini',
} as const satisfies ModelConfig
export const CLAUDE_SONNET_4_CONFIG = {
@@ -39,6 +54,7 @@ export const CLAUDE_SONNET_4_CONFIG = {
bedrock: 'us.anthropic.claude-sonnet-4-20250514-v1:0',
vertex: 'claude-sonnet-4@20250514',
foundry: 'claude-sonnet-4',
openai: 'gpt-4o-mini',
} as const satisfies ModelConfig
export const CLAUDE_SONNET_4_5_CONFIG = {
@@ -46,6 +62,7 @@ export const CLAUDE_SONNET_4_5_CONFIG = {
bedrock: 'us.anthropic.claude-sonnet-4-5-20250929-v1:0',
vertex: 'claude-sonnet-4-5@20250929',
foundry: 'claude-sonnet-4-5',
openai: 'gpt-4o',
} as const satisfies ModelConfig
export const CLAUDE_OPUS_4_CONFIG = {
@@ -53,6 +70,7 @@ export const CLAUDE_OPUS_4_CONFIG = {
bedrock: 'us.anthropic.claude-opus-4-20250514-v1:0',
vertex: 'claude-opus-4@20250514',
foundry: 'claude-opus-4',
openai: 'gpt-4o',
} as const satisfies ModelConfig
export const CLAUDE_OPUS_4_1_CONFIG = {
@@ -60,6 +78,7 @@ export const CLAUDE_OPUS_4_1_CONFIG = {
bedrock: 'us.anthropic.claude-opus-4-1-20250805-v1:0',
vertex: 'claude-opus-4-1@20250805',
foundry: 'claude-opus-4-1',
openai: 'gpt-4o',
} as const satisfies ModelConfig
export const CLAUDE_OPUS_4_5_CONFIG = {
@@ -67,6 +86,7 @@ export const CLAUDE_OPUS_4_5_CONFIG = {
bedrock: 'us.anthropic.claude-opus-4-5-20251101-v1:0',
vertex: 'claude-opus-4-5@20251101',
foundry: 'claude-opus-4-5',
openai: 'gpt-4o',
} as const satisfies ModelConfig
export const CLAUDE_OPUS_4_6_CONFIG = {
@@ -74,6 +94,7 @@ export const CLAUDE_OPUS_4_6_CONFIG = {
bedrock: 'us.anthropic.claude-opus-4-6-v1',
vertex: 'claude-opus-4-6',
foundry: 'claude-opus-4-6',
openai: 'gpt-4o',
} as const satisfies ModelConfig
export const CLAUDE_SONNET_4_6_CONFIG = {
@@ -81,6 +102,7 @@ export const CLAUDE_SONNET_4_6_CONFIG = {
bedrock: 'us.anthropic.claude-sonnet-4-6',
vertex: 'claude-sonnet-4-6',
foundry: 'claude-sonnet-4-6',
openai: 'gpt-4o',
} as const satisfies ModelConfig
// @[MODEL LAUNCH]: Register the new config here.