AnthropicVerified Active: September 23, 2026
Claude Opus 5.5API Pricing & Specifications
Anthropic's flagship 5.5 series reasoning model with 1M context, 40% cost efficiency, and 30% faster inference.
📊 Core Specifications & Pricing Rates
Standard Input
$4.00 / 1M tokens
Standard Output
$20.00 / 1M tokens
Cached Input
$0.4000 / 1M tokens
Cache Write
$5.00 / 1M tokens
Context Window
1M (1,000,000 tokens)
Max Output Tokens
128,000 tokens
Supported Capabilities:✓ Vision✓ Function Calling / Tools✓ JSON Mode✓ Deep Reasoning
📦 Asynchronous Batch API Supported: Official provider documentation offers a 50% discount on non-streaming 24h batch requests.
Live Workload Cost Estimator: Claude Opus 5.5
Adjust token volumes to simulate your exact monthly API bill.
Estimated 60% repeated context
Estimated Total Monthly Cost
Compare All Models in Calculator→$269.00/ month
$0.01076 per API request(Saves $81.00/mo with caching)
💡 Estimated Monthly Workload Scenarios
Frontier Research & Complex Architecture
$800.00/mo10,000 deep reasoning runs (10,000 input, 2,000 output)
10,000 requests • 10000 in / 2000 out
⚖️ Head-to-Head Competitor Comparisons
Claude Opus 5.5 vs. Claude Opus 5
Opus 5.5 is 20% cheaper on base rates ($4/$20 vs $5/$25) and delivers 30% faster generation speeds with identical 1M context.
20% cheaper than Opus 5View Claude Opus 5 →
Claude Opus 5.5 vs. Claude Fable 5.1
Opus 5.5 offers frontier-level performance at 60% lower cost ($4/$20 vs $10/$50), while Fable 5.1 includes Mythos-level safety guarantees.
60% cheaper than Fable 5.1View Claude Fable 5.1 →
📜 Historical Price Changes & Updates
2026-09-22
Claude Opus 5.5 released as the pioneer of the Claude 5.5 family, cutting token rates to $4/$20 per 1M tokens with 30% faster generation.
🔗 Verified Primary Sources
All pricing, token limits, and capabilities are cross-checked against official provider documentation and live API endpoints.