From 24bf877c0c565f4bf4db869f4e32b7fc7f280193 Mon Sep 17 00:00:00 2001
From: Rhys Sullivan <39114868+RhysSullivan@users.noreply.github.com>
Date: Mon, 16 Mar 2026 21:59:36 -0700
Subject: [PATCH 1/2] feat(models): add fast-tier model variants

---
 packages/core/src/schema.ts                   | 14 +++++++++
 .../models/claude-opus-4-6-fast.toml          | 28 +++++++++++++++++
 providers/openai/models/gpt-5.4-fast.toml     | 28 +++++++++++++++++
 .../opencode/models/claude-opus-4-6-fast.toml | 31 +++++++++++++++++++
 providers/opencode/models/gpt-5.4-fast.toml   | 31 +++++++++++++++++++
 5 files changed, 132 insertions(+)
 create mode 100644 providers/anthropic/models/claude-opus-4-6-fast.toml
 create mode 100644 providers/openai/models/gpt-5.4-fast.toml
 create mode 100644 providers/opencode/models/claude-opus-4-6-fast.toml
 create mode 100644 providers/opencode/models/gpt-5.4-fast.toml

diff --git a/packages/core/src/schema.ts b/packages/core/src/schema.ts
index 55b118451..4cabc3697 100644
--- a/packages/core/src/schema.ts
+++ b/packages/core/src/schema.ts
@@ -2,6 +2,19 @@ import { z } from "zod";
 
 import { ModelFamily } from "./family";
 
+const ProviderValue: z.ZodType<
+  string | number | boolean | null | Array<unknown> | Record<string, unknown>
+> = z.lazy(() =>
+  z.union([
+    z.string(),
+    z.number(),
+    z.boolean(),
+    z.null(),
+    z.array(ProviderValue),
+    z.record(ProviderValue),
+  ]),
+);
+
 const Cost = z.object({
   input: z.number().min(0, "Input price cannot be negative"),
   output: z.number().min(0, "Output price cannot be negative"),
@@ -74,6 +87,7 @@ export const Model = z
         npm: z.string().optional(),
         api: z.string().optional(),
         shape: z.enum(["responses", "completions"]).optional(),
+        options: z.record(ProviderValue).optional(),
       })
       .optional(),
   })
diff --git a/providers/anthropic/models/claude-opus-4-6-fast.toml b/providers/anthropic/models/claude-opus-4-6-fast.toml
new file mode 100644
index 000000000..d8224ef5b
--- /dev/null
+++ b/providers/anthropic/models/claude-opus-4-6-fast.toml
@@ -0,0 +1,28 @@
+name = "Claude Opus 4.6 Fast"
+family = "claude-opus"
+release_date = "2026-02-05"
+last_updated = "2026-03-16"
+attachment = true
+reasoning = true
+temperature = true
+tool_call = true
+knowledge = "2025-05"
+open_weights = false
+status = "beta"
+
+[cost]
+input = 30.00
+output = 150.00
+cache_read = 3.00
+cache_write = 37.50
+
+[limit]
+context = 1_000_000
+output = 128_000
+
+[modalities]
+input = ["text", "image", "pdf"]
+output = ["text"]
+
+[provider.options]
+speed = "fast"
diff --git a/providers/openai/models/gpt-5.4-fast.toml b/providers/openai/models/gpt-5.4-fast.toml
new file mode 100644
index 000000000..37e237b69
--- /dev/null
+++ b/providers/openai/models/gpt-5.4-fast.toml
@@ -0,0 +1,28 @@
+name = "GPT-5.4 Fast"
+family = "gpt"
+release_date = "2026-03-05"
+last_updated = "2026-03-16"
+attachment = true
+reasoning = true
+temperature = false
+knowledge = "2025-08-31"
+tool_call = true
+structured_output = true
+open_weights = false
+
+[cost]
+input = 5.00
+output = 30.00
+cache_read = 0.50
+
+[limit]
+context = 1_050_000
+input = 922_000
+output = 128_000
+
+[modalities]
+input = ["text", "image", "pdf"]
+output = ["text"]
+
+[provider.options]
+serviceTier = "priority"
diff --git a/providers/opencode/models/claude-opus-4-6-fast.toml b/providers/opencode/models/claude-opus-4-6-fast.toml
new file mode 100644
index 000000000..899d9a777
--- /dev/null
+++ b/providers/opencode/models/claude-opus-4-6-fast.toml
@@ -0,0 +1,31 @@
+name = "Claude Opus 4.6 Fast"
+family = "claude-opus"
+release_date = "2026-02-05"
+last_updated = "2026-03-16"
+attachment = true
+reasoning = true
+temperature = true
+tool_call = true
+knowledge = "2025-08-31"
+open_weights = false
+status = "beta"
+
+[cost]
+input = 30.00
+output = 150.00
+cache_read = 3.00
+cache_write = 37.50
+
+[limit]
+context = 1_000_000
+output = 128_000
+
+[modalities]
+input = ["text", "image", "pdf"]
+output = ["text"]
+
+[provider]
+npm = "@ai-sdk/anthropic"
+
+[provider.options]
+speed = "fast"
diff --git a/providers/opencode/models/gpt-5.4-fast.toml b/providers/opencode/models/gpt-5.4-fast.toml
new file mode 100644
index 000000000..89fb85acb
--- /dev/null
+++ b/providers/opencode/models/gpt-5.4-fast.toml
@@ -0,0 +1,31 @@
+name = "GPT-5.4 Fast"
+family = "gpt"
+release_date = "2026-03-05"
+last_updated = "2026-03-16"
+attachment = true
+reasoning = true
+temperature = false
+knowledge = "2025-08-31"
+tool_call = true
+structured_output = true
+open_weights = false
+
+[cost]
+input = 5.00
+output = 30.00
+cache_read = 0.50
+
+[limit]
+context = 1_050_000
+input = 922_000
+output = 128_000
+
+[modalities]
+input = ["text", "image", "pdf"]
+output = ["text"]
+
+[provider]
+npm = "@ai-sdk/openai"
+
+[provider.options]
+serviceTier = "priority"

From 9084cfa52901a853a539d6b4e8616a17a75260a0 Mon Sep 17 00:00:00 2001
From: Aiden Cline <aidenpcline@gmail.com>
Date: Wed, 1 Apr 2026 21:02:28 -0500
Subject: [PATCH 2/2] tweak: adjust field to be called 'body', convert it to
 actual request form rather than ai sdk form

---
 packages/core/src/schema.ts                          | 8 ++++----
 providers/anthropic/models/claude-opus-4-6-fast.toml | 2 +-
 providers/openai/models/gpt-5.4-fast.toml            | 4 ++--
 providers/opencode/models/claude-opus-4-6-fast.toml  | 2 +-
 providers/opencode/models/gpt-5.4-fast.toml          | 4 ++--
 5 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/packages/core/src/schema.ts b/packages/core/src/schema.ts
index 4cabc3697..5185c9481 100644
--- a/packages/core/src/schema.ts
+++ b/packages/core/src/schema.ts
@@ -2,7 +2,7 @@ import { z } from "zod";
 
 import { ModelFamily } from "./family";
 
-const ProviderValue: z.ZodType<
+const BodyValue: z.ZodType<
   string | number | boolean | null | Array<unknown> | Record<string, unknown>
 > = z.lazy(() =>
   z.union([
@@ -10,8 +10,8 @@ const ProviderValue: z.ZodType<
     z.number(),
     z.boolean(),
     z.null(),
-    z.array(ProviderValue),
-    z.record(ProviderValue),
+    z.array(BodyValue),
+    z.record(BodyValue),
   ]),
 );
 
@@ -87,7 +87,7 @@ export const Model = z
         npm: z.string().optional(),
         api: z.string().optional(),
         shape: z.enum(["responses", "completions"]).optional(),
-        options: z.record(ProviderValue).optional(),
+        body: z.record(BodyValue).optional(),
       })
       .optional(),
   })
diff --git a/providers/anthropic/models/claude-opus-4-6-fast.toml b/providers/anthropic/models/claude-opus-4-6-fast.toml
index d8224ef5b..a758629c6 100644
--- a/providers/anthropic/models/claude-opus-4-6-fast.toml
+++ b/providers/anthropic/models/claude-opus-4-6-fast.toml
@@ -24,5 +24,5 @@ output = 128_000
 input = ["text", "image", "pdf"]
 output = ["text"]
 
-[provider.options]
+[provider.body]
 speed = "fast"
diff --git a/providers/openai/models/gpt-5.4-fast.toml b/providers/openai/models/gpt-5.4-fast.toml
index 37e237b69..a9ff18a4f 100644
--- a/providers/openai/models/gpt-5.4-fast.toml
+++ b/providers/openai/models/gpt-5.4-fast.toml
@@ -24,5 +24,5 @@ output = 128_000
 input = ["text", "image", "pdf"]
 output = ["text"]
 
-[provider.options]
-serviceTier = "priority"
+[provider.body]
+service_tier = "priority"
diff --git a/providers/opencode/models/claude-opus-4-6-fast.toml b/providers/opencode/models/claude-opus-4-6-fast.toml
index 899d9a777..201603515 100644
--- a/providers/opencode/models/claude-opus-4-6-fast.toml
+++ b/providers/opencode/models/claude-opus-4-6-fast.toml
@@ -27,5 +27,5 @@ output = ["text"]
 [provider]
 npm = "@ai-sdk/anthropic"
 
-[provider.options]
+[provider.body]
 speed = "fast"
diff --git a/providers/opencode/models/gpt-5.4-fast.toml b/providers/opencode/models/gpt-5.4-fast.toml
index 89fb85acb..f5b9ea7b3 100644
--- a/providers/opencode/models/gpt-5.4-fast.toml
+++ b/providers/opencode/models/gpt-5.4-fast.toml
@@ -27,5 +27,5 @@ output = ["text"]
 [provider]
 npm = "@ai-sdk/openai"
 
-[provider.options]
-serviceTier = "priority"
+[provider.body]
+service_tier = "priority"