Atlas / Anthropic / Claude Sonnet 4.5

Claude Sonnet 4.5

Fast, cost-effective model for everyday coding, analysis, and content generation tasks.

Active Reasoning Tools Vision

Current pricing

Input

$3.00

Output

$15.00

Cached input

$0.30

per 1M tokens Source ↗

Specifications

Context window

200K tokens

Max output

16K tokens

Knowledge cutoff

Mar 2025

Capabilities

✓ Function calling / Tools

✓ Image understanding

✓ Extended thinking / Reasoning

✗ Audio input/output

TierUnitInputCached inputOutputEffectiveSource

Standard Per 1M tokens $3.00 $0.30 $15.00 March 12, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 March 11, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 March 10, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 March 9, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 March 8, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 March 7, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 March 6, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 March 1, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 Feb. 22, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 Feb. 15, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 Feb. 8, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 Feb. 1, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 Jan. 25, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 Jan. 11, 2026 Source

Standard Per 1M tokens $3.00 $0.30 $15.00 Jan. 10, 2026 Source