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feat(copilot/gemini): add Gemini 3 Pro reasoning and dynamic model fetching
- Add full Copilot model registry (all GPT, Claude, Gemini, Grok models) - Implement dynamic model fetching from Copilot API with caching - Add Gemini reasoning capture and injection for tool calls - Add reasoning_opaque and reasoning_text handling for Gemini 3 models - Evict model and reasoning caches on auth removal - Add 30-second retry delay for 429 quota errors Credit: Reverse engineering insights adapted from github.com/aadishv/vscre
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5 files changed

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‎internal/registry/copilot_models.go‎

Lines changed: 206 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -22,12 +22,217 @@ func GenerateCopilotAliases(models []*ModelInfo) []*ModelInfo {
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return result
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}
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// GetCopilotModels returns the Copilot models (raptor-mini and oswe-vscode-prime).
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// GetCopilotModels returns a conservative set of fallback models for GitHub Copilot.
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// These are used when dynamic model fetching from the Copilot API fails.
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func GetCopilotModels() []*ModelInfo {
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now := time.Now().Unix()
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defaultParams := []string{"temperature", "top_p", "max_tokens", "stream", "tools"}
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baseModels := []*ModelInfo{
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{
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ID: "gpt-4.1",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-4.1",
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Description: "Azure OpenAI model via GitHub Copilot",
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ContextLength: 128000,
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MaxCompletionTokens: 16384,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gpt-4o",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-4o",
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Description: "Azure OpenAI model via GitHub Copilot",
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ContextLength: 128000,
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MaxCompletionTokens: 4096,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gpt-41-copilot",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-4.1 Copilot",
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Description: "Azure OpenAI fine-tuned model via GitHub Copilot",
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ContextLength: 128000,
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MaxCompletionTokens: 16384,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gpt-5",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-5",
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Description: "Azure OpenAI model via GitHub Copilot",
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ContextLength: 400000,
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MaxCompletionTokens: 128000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gpt-5-mini",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-5 mini",
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Description: "Azure OpenAI model via GitHub Copilot",
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ContextLength: 264000,
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MaxCompletionTokens: 64000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gpt-5-codex",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-5-Codex (Preview)",
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Description: "OpenAI model via GitHub Copilot (Preview)",
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ContextLength: 400000,
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MaxCompletionTokens: 128000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gpt-5.1",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-5.1",
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Description: "OpenAI model via GitHub Copilot (Preview)",
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ContextLength: 264000,
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MaxCompletionTokens: 64000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gpt-5.1-codex",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-5.1-Codex",
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Description: "OpenAI model via GitHub Copilot (Preview)",
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ContextLength: 400000,
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MaxCompletionTokens: 128000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gpt-5.1-codex-mini",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "GPT-5.1-Codex-Mini",
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Description: "OpenAI model via GitHub Copilot (Preview)",
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ContextLength: 400000,
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MaxCompletionTokens: 128000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "claude-haiku-4.5",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "Claude Haiku 4.5",
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Description: "Anthropic model via GitHub Copilot",
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ContextLength: 144000,
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MaxCompletionTokens: 16000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "claude-opus-4.1",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "Claude Opus 4.1",
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Description: "Anthropic model via GitHub Copilot",
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ContextLength: 200000,
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MaxCompletionTokens: 16000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "claude-sonnet-4",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "Claude Sonnet 4",
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Description: "Anthropic model via GitHub Copilot",
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ContextLength: 216000,
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MaxCompletionTokens: 16000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "claude-sonnet-4.5",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "Claude Sonnet 4.5",
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Description: "Anthropic model via GitHub Copilot",
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ContextLength: 144000,
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MaxCompletionTokens: 16000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "claude-opus-4.5",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "Claude Opus 4.5 (Preview)",
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Description: "Anthropic model via GitHub Copilot (Preview)",
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ContextLength: 144000,
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MaxCompletionTokens: 16000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gemini-2.5-pro",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "Gemini 2.5 Pro",
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Description: "Google model via GitHub Copilot",
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ContextLength: 128000,
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MaxCompletionTokens: 64000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "gemini-3-pro-preview",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "Gemini 3 Pro (Preview)",
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Description: "Google model via GitHub Copilot (Preview)",
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ContextLength: 128000,
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MaxCompletionTokens: 64000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "grok-code-fast-1",
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Object: "model",
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Created: now,
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OwnedBy: "copilot",
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Type: "copilot",
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DisplayName: "Grok Code Fast 1",
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Description: "xAI model via GitHub Copilot",
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ContextLength: 128000,
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MaxCompletionTokens: 64000,
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SupportedParameters: defaultParams,
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},
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{
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ID: "oswe-vscode-prime",
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Object: "model",

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