Home › Compare › Anthropic: Claude Opus 5.5 vs Anthropic: Claude Sonnet 5.5 (batch)
Anthropic: Claude Opus 5.5 vs Anthropic: Claude Sonnet 5.5 (batch): API Pricing Compared
Comparing Anthropic: Claude Opus 5.5 and Anthropic: Claude Sonnet 5.5 (batch): on combined input+output list price, Anthropic: Claude Sonnet 5.5 (batch) is cheaper at $6 vs $24 per 1M tokens — a difference of $18 (75%). Anthropic: Claude Opus 5.5 costs $4 in / $20 out with a 1,000,000-token context; Anthropic: Claude Sonnet 5.5 (batch) costs $1 in / $5 out with a 1,000,000-token context.
| Anthropic: Claude Opus 5.5 | Anthropic: Claude Sonnet 5.5 (batch) | |
|---|---|---|
| Input /1M | $4 | $1 |
| Output /1M | $20 | $5 |
| Cached input /1M | $0.2 | $0.05 |
| Context window | 1,000,000 | 1,000,000 |
| Max output tokens | 128,000 | 128,000 |
| Cost @ 10M in + 2M out / mo | $80 | $20 |
Estimate your own workload in the cost calculator, or open the full pages for Anthropic: Claude Opus 5.5 and Anthropic: Claude Sonnet 5.5 (batch).
Frequently asked questions
Which is cheaper, Anthropic: Claude Opus 5.5 or Anthropic: Claude Sonnet 5.5 (batch)?
Anthropic: Claude Sonnet 5.5 (batch) is cheaper on combined list price: $6 vs $24 per 1M tokens (input + output). At 10M input + 2M output tokens per month, Anthropic: Claude Opus 5.5 costs $80 and Anthropic: Claude Sonnet 5.5 (batch) costs $20.
Which has the larger context window, Anthropic: Claude Opus 5.5 or Anthropic: Claude Sonnet 5.5 (batch)?
Anthropic: Claude Opus 5.5 has a context window of 1,000,000 tokens; Anthropic: Claude Sonnet 5.5 (batch) has 1,000,000 tokens. The larger one is Anthropic: Claude Opus 5.5.
Price snapshot October 22, 2026, refreshed daily.