Last verified 2025-09-22 (left) · 2025-09-22 (right)
Claude Opus 4.1 vs Claude Sonnet 3.7 (Legacy) — Pricing & Capability Comparison
Claude Opus 4.1 charges $15.00 per million input tokens and $75.00 per million output tokens. Claude Sonnet 3.7 (Legacy) comes in at $3.00 / $15.00. Context windows span 200K vs 200K tokens respectively.
Input price (per 1M)
Claude Opus 4.1
$15.00
Claude Sonnet 3.7 (Legacy)
$3.00
Claude Sonnet 3.7 (Legacy) leads here
Output price (per 1M)
Claude Opus 4.1
$75.00
Claude Sonnet 3.7 (Legacy)
$15.00
Claude Sonnet 3.7 (Legacy) leads here
Context window
Claude Opus 4.1
200,000 tokens
Claude Sonnet 3.7 (Legacy)
200,000 tokens
Claude Opus 4.1 leads here
Cached input
Claude Opus 4.1
Not published
Claude Sonnet 3.7 (Legacy)
Not published
No published data
Cost comparison for 10K-token workloads
Side-by-side pricing for identical workloads (10,000 total tokens per request) across different distributions.
| Scenario | Claude Opus 4.1 | Claude Sonnet 3.7 (Legacy) |
|---|---|---|
Balanced conversation 50% input · 50% output | $0.450 | $0.0900 |
Input-heavy workflow 80% input · 20% output | $0.270 | $0.0540 |
Generation heavy 30% input · 70% output | $0.570 | $0.114 |
Cached system prompt 90% cached input · 10% fresh output | $0.210 | $0.0420 |
Frequently asked questions
Which model is cheaper per million input tokens?
Claude Sonnet 3.7 (Legacy) costs $3.00 per million input tokens versus $15.00 for Claude Opus 4.1.
How do output prices compare?
Claude Sonnet 3.7 (Legacy) charges $15.00 per million output tokens, while Claude Opus 4.1 costs $75.00 per million.
Which model supports a larger context window?
Claude Opus 4.1 offers 200,000 tokens (200K) versus 200K for Claude Sonnet 3.7 (Legacy).