1M context is now generally available for Opus 4.6 and Sonnet 4.6

Claude Opus 4.6 and Sonnet 4.6 now include the full 1M context window at standard pricing on the Claude Platform. Standard per-token pricing applies across the entire 1M window, there is no long‑context premium, and media limits per request have expanded.

What’s new with general availability

One price, full context window: standard pricing across the entire 1M context window. There is no long‑context premium or multiplier.
Full rate limits at every context length: your standard account throughput applies across the entire window.
6× more media per request: media limits expand to up to 600 images or PDF pages (up from 100).
No beta header required: requests over 200K tokens now work automatically; if you’re already sending the beta header, it’s ignored so no code changes are required.

Pricing and billing details

Opus 4.6: $5 / $25 per million tokens.
Sonnet 4.6: $3 / $15 per million tokens.

There’s no multiplier: a 900K‑token request is billed at the same per‑token rate as a 9K request.

Platform availability

The expanded 1M context and media limits are available today on the Claude Platform natively and through major cloud offerings: Microsoft Azure Foundry and Google Cloud’s Vertex AI.

Claude Code inclusion

1M context is now included in Claude Code for Max, Team, and Enterprise users with Opus 4.6. Opus 4.6 sessions can use the full 1M context window automatically, meaning fewer compactions and more of the conversation kept intact. Previously, 1M context required extra usage.

Long context that holds up

A million tokens of context only matters if the model can recall the right details and reason across them. Opus 4.6 scores 78.3% on MRCR v2, the highest among frontier models at that context length.

Claude Opus 4.6 and Sonnet 4.6 maintain accuracy across the full 1M window. Long‑context retrieval has improved with each model generation.

That means you can load an entire codebase, thousands of pages of contracts, or the full trace of a long‑running agent — tool calls, observations, intermediate reasoning — and use it directly. The engineering work, lossy summarization, and context clearing that long‑context work previously required are no longer needed. The full conversation stays intact.

"Scientific discovery requires reasoning across research literature, mathematical frameworks, databases, and simulation code simultaneously. Claude Opus 4.6’s 1M context and expanded media limits let our agentic systems synthesize hundreds of papers, proofs, and codebases in a single pass, helping us dramatically accelerate fundamental and applied physics research." — Dr. Alex Wissner‑Gross, Co‑Founder

"With Claude's 1M context, an in‑house lawyer can bring five turns of a 100‑page partnership agreement into one session and finally see the full arc of a negotiation. No more toggling between versions or losing track of what changed three rounds ago." — Bardia Pourvakil, Co‑founder and CTO

Large‑scale production systems have endless context, and production incidents can get very complex. With Claude's 1M context window, we are able to keep every entity, signal, and working theory in view from first alert to re

Summary: why this matters

Full 1M context at standard pricing removes a common cost barrier to using long context.
Expanded media limits (600 images/PDF pages) make it practical to include large documents or many images in a single request.
Inclusion in Claude Code for Max, Team, and Enterprise with Opus 4.6 reduces the need for manual compaction and context engineering.
High MRCR v2 performance indicates the models can recall and reason across long context effectively.

If you rely on long conversations, large codebases, multi‑document research, or complex production incident traces, Opus 4.6 and Sonnet 4.6’s generally available 1M context window removes previous constraints around pricing, throughput, and media size.

Sources:

claude.com

1M context is now generally available for Opus 4.6 and Sonnet 4.6