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Flagship — best answers, highest costCommercial API
Claude Opus 5.5 Pricing
Anthropic · anthropic-claude-opus-5-5
Input / 1M tokens
$4.00
Output / 1M tokens
$20.00
Context window
1M tokens
≈ 1,333 pages of text
Max output
128k tokens
What it costs in practice
Typical request (1,200 in + 400 out tokens)$0.0128
1,000 requests / month$12.80/mo10,000 requests / month$128.00/mo100,000 requests / month$1,280.00/moEstimate your own workloadOpens the calculator with Claude Opus 5.5 preloaded — adjust volume and token counts there.
Price history
Only one price point recorded so far.
The staircase chart appears once a price change is detected.
What it excels at
Strong multi-step reasoning and long-context analysis, including document summarization and code refactoring over 1M-token inputs.
The business tradeoff
Output pricing at $20 per million tokens and commercial API dependency increase costs for high-volume generation workloads.
Cheaper from Anthropic
Same tier from other providers
Head-to-head
Vendor list rates, as of Sep 22, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.