Claude Opus 5.5
Last verified November 9, 2026 · Anthropic pricing ↗$4.00/1M input · $20.00/1M output · 1.0M context · Anthropic
Claude Opus 5.5 costs $4.00 per 1M input tokens and $20.00 per 1M output tokens from Anthropic, with a 1.0M-token context window. A typical chat reply (1,500 tokens in, 400 out) costs $0.014, or $140.00 per 10,000 requests. On that workload it is cheaper than 23 of the 172 other buyable models tracked here.
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What Claude Opus 5.5 Costs Per Request
At $4.00 per 1M input and $20.00 per 1M output tokens, before caching or batch discounts.
| Workload | Input / output tokens | Per request | Per 10,000 requests |
|---|---|---|---|
| Chat reply | 1,500 / 400 | $0.014 | $140.00 |
| RAG answer over retrieved docs | 8,000 / 600 | $0.044 | $440.00 |
| Coding-agent step | 30,000 / 2,000 | $0.160 | $1600.00 |
Claude Opus 5.5 vs Similarly Priced Models
Nearest buyable models by price, with the RAG answer above (8,000 in / 600 out) priced on each.
| Model | Input /1M | Output /1M | Context | RAG answer |
|---|---|---|---|---|
| Claude Opus 5.5 Anthropic | $4.00 | $20.00 | 1.0M | $0.044 |
| Claude Opus 5 Anthropic | $5.00 | $25.00 | 1.0M | $0.055 |
| GPT-5.6 Sol OpenAI | $4.00 | $20.00 | 1.1M | $0.044 |
| Muse Wonder Meta | $4.00 | $20.00 | 1.0M | $0.044 |
Alternatives to Claude Opus 5.5
Pricing Details
AnthropicLaunched September 22, 2026. Card: $4.00 input, $5.00 5-minute cache write, $8.00 1-hour cache write, $0.20 cache hit, $20.00 output. 20% under Opus 5 on input, output and both cache writes; the cache hit is 60% under Opus 5's $0.50 because Anthropic prices Opus 5.5 cache hits and refreshes at 0.05x base input, against 0.1x on most Claude models and 0.025x on Fable 5.1 and Mythos 5.1. Batch $2.00/$10.00, which is GPT-6 Sol's Standard card. Fast mode $8.00/$40.00, first-party API only, not with Batch. Full 1M context at standard pricing, no long-context tier. inference_geo 'us' is 1.1x; Bedrock and Google Cloud regional endpoints +10%. Max output 128K (300K on Batch with the output-300k-2026-03-24 beta header). Adaptive thinking always on; effort low/medium/high/xhigh/max, default MEDIUM where Opus 5 defaulted to high, which is how Anthropic's '40% less than Opus 5 on typical workloads' is scoped ('at default settings'). Same tokenizer as Opus 5. Knowledge cutoff June 2026. Available on Claude API, Bedrock, Google Cloud, Microsoft Foundry and Claude Platform on AWS. Anthropic-reported (max effort): Terminal-Bench 4.0 66.4 (Opus 5 52.3, GPT-6 Astra 57.9), CursorBench 4.0 57.8, OSWorld 2.0 81.8, GDPval-AA v2.1 1846 Elo, HLE with tools 67.7. Artificial Analysis Intelligence Index v4.3.2 (read 2026-09-28): max 58 at $5.98 per task and $8,708 to run the index (119k output tokens per task, 682.71s TTFT); xhigh 56 / $3.46; high 54 / $1.82; medium 51 / $1.34; low 42 / $0.55. At max effort it costs more per task than Opus 5 max ($5.86) despite the cheaper card, because it spent 260M output tokens on the index against 140M. API ID: claude-opus-5-5.
Input / 1M tokens
$4
Output / 1M tokens
$20
Context Window
1.0M
Max Output
128K
Price History
No price change recorded since 2026-09-28, when this site started tracking this model; it launched on 2026-09-22.
Frequently Asked Questions
Common questions about Claude Opus 5.5 pricing and usage
How much does Claude Opus 5.5 cost?
Claude Opus 5.5 costs $4 per 1 million input tokens and $20 per 1 million output tokens. This pricing is set by Anthropic.
What tokenizer does Claude Opus 5.5 use?
Claude Opus 5.5 uses the cl100k_base tokenizer. This tokenizer has a vocabulary of ~100,000 tokens and is widely used across many models.
What is Claude Opus 5.5's context window?
Claude Opus 5.5 supports a context window of 1.0M tokens (1,000,000 tokens). The maximum output length is 128K tokens.
How does Claude Opus 5.5 compare to other models?
On an 8,000-token-in, 600-token-out RAG answer, Claude Opus 5.5 costs $0.044 per request. The nearest-priced alternatives cost: Claude Opus 5 (Anthropic) $0.055, GPT-5.6 Sol (OpenAI) $0.044, Muse Wonder (Meta) $0.044. The table above lists their full rates and context windows.
How do I count tokens for Claude Opus 5.5?
Use the token counter at the top of this page or visit the homepage calculator. Paste your text and it will show the exact token count and cost for Claude Opus 5.5 using the cl100k_base tokenizer.
Read More About Claude Opus 5.5
Gemini 4 Carbon tops the index on Opus 5.5's $4/$20 card and costs 23% less per task. Drop one point and Opus or Astra is cheaper, and you can't call Carbon yet.
October 31, 2026 · 7 min read
Gemini 4 Argon is out of preview, and its $2 price now has an end date: November 30. Until then it is the cheapest frontier model for prompts over 272K tokens. On December 1 it costs what Claude Opus 5.5 costs.
October 20, 2026 · 6 min read
Meta priced Muse Wonder at Claude Opus 5.5's $4 and $20 to the cent. Opus on high effort outscores it for 40% of the cost per task, and the Wonder that beats Opus at coding isn't sold by the token.
October 13, 2026 · 6 min read