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40 lines
1.8 KiB
C#
40 lines
1.8 KiB
C#
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using static AIStudio.Provider.Capability;
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namespace AIStudio.Models.OpenAI;
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/// <summary>
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/// GPT-4 and GPT-4 Turbo.
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/// </summary>
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/// <remarks>
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/// GPT-4o is not one of these, which the name hides and the matching does not: a rule bound to the
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/// start of a name only answers where a name part ends, and in "gpt-4o" the part goes on. The
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/// previous rules had to say that twice, once as an exact comparison and once as a prefix.
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/// </remarks>
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public sealed class Gpt4Family : ModelFamily
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{
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/// <inheritdoc />
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public override ModelVendor Vendor => ModelVendor.OPEN_AI;
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/// <inheritdoc />
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public override ModelSource Source => new("https://developers.openai.com/api/docs/models/gpt-4-turbo", new DateOnly(2026, 9, 12), "Capabilities ported unchanged from ProviderExtensions.OpenAI.cs: GPT-4 is text only, Turbo adds images and tool calling. The windows are the documented 8,192 tokens of GPT-4 and the 128,000 Turbo raised it to.");
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/// <inheritdoc />
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public override IReadOnlyList<ModelSource> FurtherSources =>
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[
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new("https://github.com/openai/tiktoken/blob/main/tiktoken/model.py", new DateOnly(2026, 9, 12), "OpenAI's own mapping from model names to encodings. It maps \"gpt-4\" and the prefix \"gpt-4-\" to cl100k_base, so Turbo uses it too -- the newer o200k_base begins with the 4o line, which is a family of its own here.")
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];
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/// <inheritdoc />
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protected override void Declare(ModelFamilyBuilder builder)
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{
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builder.Rule("gpt-4").AsPrefix()
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.Capabilities(TEXT_INPUT | TEXT_OUTPUT)
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.Apis(RESPONSES_API)
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.ContextWindow(8_192)
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.Tokenizer(TokenizerKind.TIKTOKEN, "cl100k_base");
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builder.Rule("gpt-4-turbo").AsPrefix().Inherits()
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.Capabilities(MULTIPLE_IMAGE_INPUT | FUNCTION_CALLING)
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.ContextWindow(128_000);
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}
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}
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