Claude Opus 4.6 in 2026: active legacy status, 1M context, pricing, and what Opus 5 changed
Updated: 6 days ago
Claude Opus 4.6 launched in February 2026 as a major step in Anthropic's agentic model line. Today it is active but classified as legacy, with Claude Opus 5 as the recommended successor.
Opus 4.6 remains technically relevant because its API is still active, its 1M context and 128K output remain large, and its base price has not changed. The main update is lifecycle position rather than disappearance.
··········
OPUS 4.6 IS STILL CALLABLE
Anthropic's current documentation continues to list claude-opus-4-6 as an active legacy model across the Claude API and major cloud platforms. It should not be described as retired.
........
Specification | Claude Opus 4.6 in 2026 |
|---|---|
API ID | claude-opus-4-6 |
Lifecycle | Active legacy |
Context window | 1M tokens |
Max output | 128K tokens; 300K Batch API beta |
Base API price | $5 input / $25 output per MTok |
Thinking | Adaptive; extended thinking deprecated |
Recommended migration | Claude Opus 5 |
........
··········
THE 1M CONTEXT WINDOW REMAINS A CORE SPECIFICATION
Opus 4.6 supports a 1M-token context window and up to 128K output tokens. Anthropic also lists a 300K maximum output option in the Batch API beta.
··········
PRICING REMAINS $5 INPUT AND $25 OUTPUT
Standard API pricing is $5 per million input tokens and $25 per million output tokens. Prompt-cache writes and reads have separate rates, while Batch API receives a 50% input/output discount.
··········
OPUS 5 REPLACED ITS POSITION, NOT ITS API OVERNIGHT
Opus 5 became the current Opus generation in July 2026 and is Anthropic's stronger Opus model. It also uses the same $5/$25 base token pricing, making the migration decision primarily about behavior, capability, and validation rather than higher headline token cost.
··········
REASONING CONFIGURATION HAS EVOLVED
The current Opus 4.6 documentation uses adaptive thinking and marks extended thinking as deprecated. Applications that were built around older reasoning controls should include that change in migration testing.
··········
CLOUD AVAILABILITY REMAINS BROAD
Opus 4.6 remains listed for the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry, and Claude Platform on AWS, though platform-specific model IDs differ.
··········
HOW TO TREAT OPUS 4.6 NOW
Existing production deployments can continue during a controlled migration. New systems should benchmark Opus 5 first because Anthropic now labels Opus 4.6 legacy and explicitly recommends the newer generation.
··········
FOLLOW US FOR MORE
··········
DATA STUDIOS
··········
