From 82207235aedbda8faf2eeb31c96e260d93e768b8 Mon Sep 17 00:00:00 2001
From: "zed-zippy[bot]" <234243425+zed-zippy[bot]@users.noreply.github.com>
Date: Thu, 5 Feb 2026 19:07:45 +0000
Subject: [PATCH] Add Claude Opus 4.6 and 1M context window model variants
(#48508) (cherry-pick to stable) (#48511)
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Cherry-pick of #48508 to stable
----
This adds Claude Opus 4.6 as a new Anthropic model, along with 1M
context window variants for both Opus 4.6 and Sonnet 4.5.
## Opus 4.6
Adds `ClaudeOpus4_6` and `ClaudeOpus4_6Thinking` with the same
properties as other Claude 4+ models (200k context, 8192 max output
tokens, fine-grained tool streaming beta header).
## 1M context variants
Adds 1M context window variants for Sonnet 4.5 and Opus 4.6. These are
identical to their base models except:
- Context window is 1,000,000 tokens instead of 200,000
- They send the `context-1m-2025-08-07` beta header
Release Notes:
- Added Claude Opus 4.6
- Now Claude Opus 4.6 and Sonnet 4.5 BYOK models support variations that
have context windows of 1 million tokens (and have different pricing)
Co-authored-by: Richard Feldman
---
crates/anthropic/src/anthropic.rs | 133 +++++++++++++++++++++++++++---
1 file changed, 123 insertions(+), 10 deletions(-)
diff --git a/crates/anthropic/src/anthropic.rs b/crates/anthropic/src/anthropic.rs
index f0dde3eedea657ea2d2ebe9ede457e329bd8b9a5..3f87acaf56d77a62ff8fba83295201b33572a872 100644
--- a/crates/anthropic/src/anthropic.rs
+++ b/crates/anthropic/src/anthropic.rs
@@ -16,6 +16,9 @@ pub mod batches;
pub const ANTHROPIC_API_URL: &str = "https://api.anthropic.com";
+pub const FINE_GRAINED_TOOL_STREAMING_BETA_HEADER: &str = "fine-grained-tool-streaming-2025-05-14";
+pub const CONTEXT_1M_BETA_HEADER: &str = "context-1m-2025-08-07";
+
#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
#[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq)]
pub struct AnthropicModelCacheConfiguration {
@@ -76,6 +79,23 @@ pub enum Model {
alias = "claude-opus-4-5-thinking-latest"
)]
ClaudeOpus4_5Thinking,
+ #[serde(rename = "claude-opus-4-6", alias = "claude-opus-4-6-latest")]
+ ClaudeOpus4_6,
+ #[serde(
+ rename = "claude-opus-4-6-thinking",
+ alias = "claude-opus-4-6-thinking-latest"
+ )]
+ ClaudeOpus4_6Thinking,
+ #[serde(
+ rename = "claude-opus-4-6-1m-context",
+ alias = "claude-opus-4-6-1m-context-latest"
+ )]
+ ClaudeOpus4_6_1mContext,
+ #[serde(
+ rename = "claude-opus-4-6-1m-context-thinking",
+ alias = "claude-opus-4-6-1m-context-thinking-latest"
+ )]
+ ClaudeOpus4_6_1mContextThinking,
#[serde(rename = "claude-sonnet-4", alias = "claude-sonnet-4-latest")]
ClaudeSonnet4,
#[serde(
@@ -91,6 +111,16 @@ pub enum Model {
alias = "claude-sonnet-4-5-thinking-latest"
)]
ClaudeSonnet4_5Thinking,
+ #[serde(
+ rename = "claude-sonnet-4-5-1m-context",
+ alias = "claude-sonnet-4-5-1m-context-latest"
+ )]
+ ClaudeSonnet4_5_1mContext,
+ #[serde(
+ rename = "claude-sonnet-4-5-1m-context-thinking",
+ alias = "claude-sonnet-4-5-1m-context-thinking-latest"
+ )]
+ ClaudeSonnet4_5_1mContextThinking,
#[serde(rename = "claude-3-7-sonnet", alias = "claude-3-7-sonnet-latest")]
Claude3_7Sonnet,
#[serde(
@@ -140,6 +170,22 @@ impl Model {
}
pub fn from_id(id: &str) -> Result {
+ if id.starts_with("claude-opus-4-6-1m-context-thinking") {
+ return Ok(Self::ClaudeOpus4_6_1mContextThinking);
+ }
+
+ if id.starts_with("claude-opus-4-6-1m-context") {
+ return Ok(Self::ClaudeOpus4_6_1mContext);
+ }
+
+ if id.starts_with("claude-opus-4-6-thinking") {
+ return Ok(Self::ClaudeOpus4_6Thinking);
+ }
+
+ if id.starts_with("claude-opus-4-6") {
+ return Ok(Self::ClaudeOpus4_6);
+ }
+
if id.starts_with("claude-opus-4-5-thinking") {
return Ok(Self::ClaudeOpus4_5Thinking);
}
@@ -164,6 +210,14 @@ impl Model {
return Ok(Self::ClaudeOpus4);
}
+ if id.starts_with("claude-sonnet-4-5-1m-context-thinking") {
+ return Ok(Self::ClaudeSonnet4_5_1mContextThinking);
+ }
+
+ if id.starts_with("claude-sonnet-4-5-1m-context") {
+ return Ok(Self::ClaudeSonnet4_5_1mContext);
+ }
+
if id.starts_with("claude-sonnet-4-5-thinking") {
return Ok(Self::ClaudeSonnet4_5Thinking);
}
@@ -227,10 +281,18 @@ impl Model {
Self::ClaudeOpus4_1Thinking => "claude-opus-4-1-thinking-latest",
Self::ClaudeOpus4_5 => "claude-opus-4-5-latest",
Self::ClaudeOpus4_5Thinking => "claude-opus-4-5-thinking-latest",
+ Self::ClaudeOpus4_6 => "claude-opus-4-6-latest",
+ Self::ClaudeOpus4_6Thinking => "claude-opus-4-6-thinking-latest",
+ Self::ClaudeOpus4_6_1mContext => "claude-opus-4-6-1m-context-latest",
+ Self::ClaudeOpus4_6_1mContextThinking => "claude-opus-4-6-1m-context-thinking-latest",
Self::ClaudeSonnet4 => "claude-sonnet-4-latest",
Self::ClaudeSonnet4Thinking => "claude-sonnet-4-thinking-latest",
Self::ClaudeSonnet4_5 => "claude-sonnet-4-5-latest",
Self::ClaudeSonnet4_5Thinking => "claude-sonnet-4-5-thinking-latest",
+ Self::ClaudeSonnet4_5_1mContext => "claude-sonnet-4-5-1m-context-latest",
+ Self::ClaudeSonnet4_5_1mContextThinking => {
+ "claude-sonnet-4-5-1m-context-thinking-latest"
+ }
Self::Claude3_5Sonnet => "claude-3-5-sonnet-latest",
Self::Claude3_7Sonnet => "claude-3-7-sonnet-latest",
Self::Claude3_7SonnetThinking => "claude-3-7-sonnet-thinking-latest",
@@ -250,8 +312,15 @@ impl Model {
Self::ClaudeOpus4 | Self::ClaudeOpus4Thinking => "claude-opus-4-20250514",
Self::ClaudeOpus4_1 | Self::ClaudeOpus4_1Thinking => "claude-opus-4-1-20250805",
Self::ClaudeOpus4_5 | Self::ClaudeOpus4_5Thinking => "claude-opus-4-5-20251101",
+ Self::ClaudeOpus4_6
+ | Self::ClaudeOpus4_6Thinking
+ | Self::ClaudeOpus4_6_1mContext
+ | Self::ClaudeOpus4_6_1mContextThinking => "claude-opus-4-6",
Self::ClaudeSonnet4 | Self::ClaudeSonnet4Thinking => "claude-sonnet-4-20250514",
- Self::ClaudeSonnet4_5 | Self::ClaudeSonnet4_5Thinking => "claude-sonnet-4-5-20250929",
+ Self::ClaudeSonnet4_5
+ | Self::ClaudeSonnet4_5Thinking
+ | Self::ClaudeSonnet4_5_1mContext
+ | Self::ClaudeSonnet4_5_1mContextThinking => "claude-sonnet-4-5-20250929",
Self::Claude3_5Sonnet => "claude-3-5-sonnet-latest",
Self::Claude3_7Sonnet | Self::Claude3_7SonnetThinking => "claude-3-7-sonnet-latest",
Self::ClaudeHaiku4_5 | Self::ClaudeHaiku4_5Thinking => "claude-haiku-4-5-20251001",
@@ -271,10 +340,16 @@ impl Model {
Self::ClaudeOpus4_1Thinking => "Claude Opus 4.1 Thinking",
Self::ClaudeOpus4_5 => "Claude Opus 4.5",
Self::ClaudeOpus4_5Thinking => "Claude Opus 4.5 Thinking",
+ Self::ClaudeOpus4_6 => "Claude Opus 4.6",
+ Self::ClaudeOpus4_6Thinking => "Claude Opus 4.6 Thinking",
+ Self::ClaudeOpus4_6_1mContext => "Claude Opus 4.6 (1M context)",
+ Self::ClaudeOpus4_6_1mContextThinking => "Claude Opus 4.6 Thinking (1M context)",
Self::ClaudeSonnet4 => "Claude Sonnet 4",
Self::ClaudeSonnet4Thinking => "Claude Sonnet 4 Thinking",
Self::ClaudeSonnet4_5 => "Claude Sonnet 4.5",
Self::ClaudeSonnet4_5Thinking => "Claude Sonnet 4.5 Thinking",
+ Self::ClaudeSonnet4_5_1mContext => "Claude Sonnet 4.5 (1M context)",
+ Self::ClaudeSonnet4_5_1mContextThinking => "Claude Sonnet 4.5 Thinking (1M context)",
Self::Claude3_7Sonnet => "Claude 3.7 Sonnet",
Self::Claude3_5Sonnet => "Claude 3.5 Sonnet",
Self::Claude3_7SonnetThinking => "Claude 3.7 Sonnet Thinking",
@@ -298,10 +373,16 @@ impl Model {
| Self::ClaudeOpus4_1Thinking
| Self::ClaudeOpus4_5
| Self::ClaudeOpus4_5Thinking
+ | Self::ClaudeOpus4_6
+ | Self::ClaudeOpus4_6Thinking
+ | Self::ClaudeOpus4_6_1mContext
+ | Self::ClaudeOpus4_6_1mContextThinking
| Self::ClaudeSonnet4
| Self::ClaudeSonnet4Thinking
| Self::ClaudeSonnet4_5
| Self::ClaudeSonnet4_5Thinking
+ | Self::ClaudeSonnet4_5_1mContext
+ | Self::ClaudeSonnet4_5_1mContextThinking
| Self::Claude3_5Sonnet
| Self::ClaudeHaiku4_5
| Self::ClaudeHaiku4_5Thinking
@@ -329,6 +410,8 @@ impl Model {
| Self::ClaudeOpus4_1Thinking
| Self::ClaudeOpus4_5
| Self::ClaudeOpus4_5Thinking
+ | Self::ClaudeOpus4_6
+ | Self::ClaudeOpus4_6Thinking
| Self::ClaudeSonnet4
| Self::ClaudeSonnet4Thinking
| Self::ClaudeSonnet4_5
@@ -342,27 +425,37 @@ impl Model {
| Self::Claude3Opus
| Self::Claude3Sonnet
| Self::Claude3Haiku => 200_000,
+ Self::ClaudeOpus4_6_1mContext
+ | Self::ClaudeOpus4_6_1mContextThinking
+ | Self::ClaudeSonnet4_5_1mContext
+ | Self::ClaudeSonnet4_5_1mContextThinking => 1_000_000,
Self::Custom { max_tokens, .. } => *max_tokens,
}
}
pub fn max_output_tokens(&self) -> u64 {
match self {
+ Self::Claude3_5Sonnet | Self::Claude3_5Haiku => 8_192,
Self::ClaudeOpus4
- | Self::ClaudeOpus4_1
| Self::ClaudeOpus4Thinking
- | Self::ClaudeOpus4_1Thinking
- | Self::ClaudeOpus4_5
+ | Self::ClaudeOpus4_1
+ | Self::ClaudeOpus4_1Thinking => 32_000,
+ Self::ClaudeOpus4_5
| Self::ClaudeOpus4_5Thinking
| Self::ClaudeSonnet4
| Self::ClaudeSonnet4Thinking
| Self::ClaudeSonnet4_5
| Self::ClaudeSonnet4_5Thinking
- | Self::Claude3_5Sonnet
+ | Self::ClaudeSonnet4_5_1mContext
+ | Self::ClaudeSonnet4_5_1mContextThinking
| Self::Claude3_7Sonnet
| Self::Claude3_7SonnetThinking
- | Self::Claude3_5Haiku => 8_192,
- Self::ClaudeHaiku4_5 | Self::ClaudeHaiku4_5Thinking => 64_000,
+ | Self::ClaudeHaiku4_5
+ | Self::ClaudeHaiku4_5Thinking => 64_000,
+ Self::ClaudeOpus4_6
+ | Self::ClaudeOpus4_6Thinking
+ | Self::ClaudeOpus4_6_1mContext
+ | Self::ClaudeOpus4_6_1mContextThinking => 128_000,
Self::Claude3Opus | Self::Claude3Sonnet | Self::Claude3Haiku => 4_096,
Self::Custom {
max_output_tokens, ..
@@ -378,10 +471,16 @@ impl Model {
| Self::ClaudeOpus4_1Thinking
| Self::ClaudeOpus4_5
| Self::ClaudeOpus4_5Thinking
+ | Self::ClaudeOpus4_6
+ | Self::ClaudeOpus4_6Thinking
+ | Self::ClaudeOpus4_6_1mContext
+ | Self::ClaudeOpus4_6_1mContextThinking
| Self::ClaudeSonnet4
| Self::ClaudeSonnet4Thinking
| Self::ClaudeSonnet4_5
| Self::ClaudeSonnet4_5Thinking
+ | Self::ClaudeSonnet4_5_1mContext
+ | Self::ClaudeSonnet4_5_1mContextThinking
| Self::Claude3_5Sonnet
| Self::Claude3_7Sonnet
| Self::Claude3_7SonnetThinking
@@ -403,8 +502,11 @@ impl Model {
Self::ClaudeOpus4
| Self::ClaudeOpus4_1
| Self::ClaudeOpus4_5
+ | Self::ClaudeOpus4_6
+ | Self::ClaudeOpus4_6_1mContext
| Self::ClaudeSonnet4
| Self::ClaudeSonnet4_5
+ | Self::ClaudeSonnet4_5_1mContext
| Self::Claude3_5Sonnet
| Self::Claude3_7Sonnet
| Self::ClaudeHaiku4_5
@@ -415,8 +517,11 @@ impl Model {
Self::ClaudeOpus4Thinking
| Self::ClaudeOpus4_1Thinking
| Self::ClaudeOpus4_5Thinking
+ | Self::ClaudeOpus4_6Thinking
+ | Self::ClaudeOpus4_6_1mContextThinking
| Self::ClaudeSonnet4Thinking
| Self::ClaudeSonnet4_5Thinking
+ | Self::ClaudeSonnet4_5_1mContextThinking
| Self::ClaudeHaiku4_5Thinking
| Self::Claude3_7SonnetThinking => AnthropicModelMode::Thinking {
budget_tokens: Some(4_096),
@@ -432,21 +537,29 @@ impl Model {
Self::ClaudeOpus4
| Self::ClaudeOpus4_1
| Self::ClaudeOpus4_5
+ | Self::ClaudeOpus4_6
| Self::ClaudeSonnet4
| Self::ClaudeSonnet4_5
| Self::ClaudeOpus4Thinking
| Self::ClaudeOpus4_1Thinking
| Self::ClaudeOpus4_5Thinking
+ | Self::ClaudeOpus4_6Thinking
| Self::ClaudeSonnet4Thinking
| Self::ClaudeSonnet4_5Thinking => {
- // Fine-grained tool streaming for newer models
- headers.push("fine-grained-tool-streaming-2025-05-14".to_string());
+ headers.push(FINE_GRAINED_TOOL_STREAMING_BETA_HEADER.to_string());
+ }
+ Self::ClaudeOpus4_6_1mContext
+ | Self::ClaudeOpus4_6_1mContextThinking
+ | Self::ClaudeSonnet4_5_1mContext
+ | Self::ClaudeSonnet4_5_1mContextThinking => {
+ headers.push(FINE_GRAINED_TOOL_STREAMING_BETA_HEADER.to_string());
+ headers.push(CONTEXT_1M_BETA_HEADER.to_string());
}
Self::Claude3_7Sonnet | Self::Claude3_7SonnetThinking => {
// Try beta token-efficient tool use (supported in Claude 3.7 Sonnet only)
// https://docs.anthropic.com/en/docs/build-with-claude/tool-use/token-efficient-tool-use
headers.push("token-efficient-tools-2025-02-19".to_string());
- headers.push("fine-grained-tool-streaming-2025-05-14".to_string());
+ headers.push(FINE_GRAINED_TOOL_STREAMING_BETA_HEADER.to_string());
}
Self::Custom {
extra_beta_headers, ..