Claude Opus 5.5 vs Sonar

Price, context window & benchmark comparison

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Claude Opus 5.5

Anthropic
$4.00 / $20.00
Input / Output · per 1M tokens
VS
P

Sonar

Perplexity
$1.00 / $1.00
Input / Output · per 1M tokens
Compare different models
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Verdict: Sonar is 8.0× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix. Claude Opus 5.5 has the larger context window (1M vs 127K).
Claude Opus 5.5Sonar
Input price / 1M$4.00$1.00
Output price / 1M$20.00$1.00
Blended price (3:1)$8.00$1.00
Cached input / 1M$0.20
Context window1M127K
Max output128K114K
Intelligence index57.6
Coding index
Providers11
Best provider uptime (30m)100.0%
Vision inputYesYes
ReasoningYesNo
Tool callingYesNo
Released2026-09-222025-01-27
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FAQ

Which is cheaper, Claude Opus 5.5 or Sonar?

Sonar is 8.0× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix.

Claude Opus 5.5 vs Sonar: which has a bigger context window?

Claude Opus 5.5: 1,000,000 tokens. Sonar: 127,072 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Opus 5.5 ≈ $18,000, Sonar ≈ $2,500.

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