Anthropic just dropped Claude Opus 4.6—and it's not just an upgrade, it's a generational leap. Released February 5, 2026, this is the most capable AI model ever created for professional work, featuring revolutionary agent teams, a massive 1 million token context window, and coding capabilities that outperform every competitor.
Within hours of release, Opus 4.6 has already discovered over 500 zero-day security vulnerabilities in open-source software.
What's New in Opus 4.6
- Agent Teams — Multi-agent orchestration for parallel task execution
- 1M Token Context — First Opus-class model with million-token context
- Superior Coding — #1 on Terminal-Bench 2.0 and SWE-Bench Pro
- 500 Zero-Days Found — Discovered critical vulnerabilities autonomously
Agent Teams
The headline feature is agent teams—instead of a single agent working sequentially, Opus 4.6 can spawn specialized sub-agents for different components, run tools in parallel, and coordinate results autonomously.
Benchmark Results
| Benchmark | Result |
|---|---|
| Terminal-Bench 2.0 | #1 |
| Humanity's Last Exam | #1 |
| GDPval-AA | +144 Elo vs GPT-5.2 |
| SWE-Bench Pro | State-of-the-art |
Opus 4.6 vs GPT-5.3-Codex
In a remarkable coincidence, OpenAI released GPT-5.3-Codex on the same day.
| Feature | Opus 4.6 | GPT-5.3-Codex |
|---|---|---|
| Context Window | 1M tokens | Not disclosed |
| Agent Teams | Yes | No |
| Terminal-Bench | #1 | #2 |
Pricing
- Input: $5 per million tokens
- Output: $25 per million tokens
Available now at claude.ai and the Claude API.
Originally published on Serenities AI
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