# Sonnet 4.6 Defaults Free/Pro — Near-Frontier on the Path Most People Actually Run

Times of AI Desk · 2026-02-17 · Models

[https://timesof.ai/2026/02/anthropic-claude-sonnet-4-6-default-free-pro](https://timesof.ai/2026/02/anthropic-claude-sonnet-4-6-default-free-pro)

> Anthropic launched Claude Sonnet 4.6 (Feb 17) as default Free/Pro on Claude.ai and Cowork; $3/$15 MTok same as 4.5; 1M context beta. Early Claude Code preference ~70% vs 4.5 and 59% vs Opus 4.5—vendor. Compresses gap between best model and default UX twelve days after Opus 4.6.

Twelve days after Opus 4.6, Anthropic’s proprietary GTM move: put near-frontier capability on the **default Free/Pro path**—not only Max/API power users. That compresses the gap between “best model” and “what most people actually run.”

**Anthropic** released **Claude Sonnet 4.6** on February 17 as the most capable Sonnet yet and the **default** on Free and Pro in **claude.ai** and **Claude Cowork**. Pricing: **$3/$15 per million tokens** (same as Sonnet 4.5). Context: **1M token** window in **beta**. Full upgrade pitch across coding, computer use, long-context reasoning, agent planning, knowledge work, design. API id `claude-sonnet-4-6`; adaptive/extended thinking; context compaction (beta); web search/fetch improvements; several tools GA. Free tier upgraded with file creation, connectors, skills, compaction. Safety: system card; researchers described broadly warm/prosocial character, strong safety behaviors; improved prompt-injection resistance vs 4.5, similar to Opus 4.6. Computer use: continued OSWorld gains; early users reported near human-level on complex spreadsheets/multi-step forms (still lagging top human operators). Early Claude Code testers preferred 4.6 over 4.5 ~**70%** and over Opus 4.5 **59%** (Anthropic)—less overengineering, better instruction following. Partners (Databricks, Replit, Cursor, GitHub, Cognition, others) highlighted near-Opus document/enterprise workloads at Sonnet cost.

## Claims vs checks

Default status, pricing, and 1M beta are **Anthropic primary**. Preference percentages and partner quotes are **vendor**. Independent Elo/AA boards: verify when listed—do not treat 70%/59% as public Arena. OSWorld and computer-use “near human” claims remain lab/early-user.

## Limits

- Free/Pro default ≠ Max rate limits or Opus ceiling.
- 1M context in beta: quality and pricing at long horizon may differ from marketed ideal.
- Preference tests are internal early-adopter samples.

## Sources

- Anthropic: [“Introducing Claude Sonnet 4.6”](https://anthropic.com/news/claude-sonnet-4-6) (February 17, 2026). Primary.
- Claude Sonnet 4.6 System Card (February 17, 2026).
- Snowflake Cortex same-day availability note (February 17, 2026).