Breaking

Anthropic Releases Claude Sonnet 5 at $2/$10 Pricing

June 30, 2026 at 11:36 EDT

Foundation Models
Software Dev & Coding
AI Agents

Anthropic released Claude Sonnet 5, its new mid-tier model, on June 30, 2026, setting a promotional price of $2 per million input tokens and $10 per million output tokens, while emphasizing a 1M-token context window and enhanced agentic capabilities.

June 30, 2026 (expected) · Anthropic · Leak

Claude Sonnet 5: "Opus-class" performance at Sonnet pricing

Reportedly outperforming the higher-tier Opus 4.8 on several benchmarks while cutting API costs — surfacing early in Claude Code's model selector. No official announcement is confirmed; figures come from leaks under the codename "Fennec."

per 1M input tokens
(was ~$3)

$10

per 1M output tokens
(was ~$15)

token context
version expected

Jan '26

knowledge cutoff

Output price per 1M tokens

Same unit, drawn to scale — Sonnet 5's promo rate vs the typical prior Sonnet class.

$10

Sonnet 5 (leak)

$15

Prior Sonnet class

≈ one-third cheaper output — bills ease for API-heavy users.

What's reportedly new

Vision upgrade → stronger visual reasoning over UI mockups and architecture diagrams.
Benchmarks → said to exceed the higher-tier Opus 4.8 (specific figures not disclosed).
Rollout → worldwide, with a likely possibility of no ID verification.
Signal → already appearing in Claude Code's selector as a recommended option.

Developer optimism

"If Opus 4.8-level performance is usable for less than half the price, API bills would ease." A natural evolution of the everyday coding & agent workhorse.

Open questions

Doubts about "absolute differences" in reasoning depth and stability vs Opus — and how "on par with Opus 4.8" should be judged. Official figures await confirmation.

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