Claude Opus 5.5 API pricing
Anthropic's high-end line for complex reasoning and agentic work. Claude Opus 5.5, released 22 September 2026, costs $4 / $20 per 1M tokens, 20% less than Opus 5.
Claude Opus 5.5 prices
The 10th cheapest of 12 current frontier models (blended 3:1). Cheapest: DeepSeek V4 Pro, $1.32 / $3.96.
Capability score 169, joint 2nd of 29 current models scored on the Epoch Capabilities Index (range 166–172).
GPT-6.1 Terra scores level (168) and costs 4× less on a coding agent: $213 vs $853 a month.
Source: Epoch Capabilities Index by Epoch AI, CC BY 4.0, read 11 Nov 2026. What the score means
What it costs in practice
Claude Opus 5.5 at list prices, no batch discount.
| 1,000 chat replies1,500 tokens in and 300 out each | $12.00 |
|---|---|
| Summarising 100 long reports20,000 tokens in and 800 out each | $9.60 |
| A month of a coding agent400 tasks, 85% of input cached | $738 |
The coding-agent example assumes 85% of input is served from cache, typical for agents that resend the same context each step. Work out AI agent cost on Claude Opus 5.5
Details
claude-opus-5-5- Fast mode costs $8 / $40 per 1M tokens on the Claude API.
- 20% cheaper than Claude Opus 5 on both input and output.
Checked 11 Nov 2026 against Anthropic pricing and TechCrunch, 22 Sep 2026 .
Estimate your monthly cost
List prices, no batch discount
| Model | Input / output per 1M | Per month |
|---|---|---|
| Claude Opus 5.5 | $4.00 / $20.00 | $80.00 |
| DeepSeek V4 ProCheaper alternative · DeepSeek | $1.32 / $3.96 | $21.12 |
| Kimi K3Similar price · Moonshot AI | $3.00 / $15.00 | $60.00 |
Type amounts like 500K, 25M or 2B.
Price Claude Opus 5.5 in: Token cost calculator · AI agent cost · Token counter · Claude Code plans
Cheaper alternative
DeepSeek V4 Pro (DeepSeek) costs $1.32 / $3.96 per 1M tokens, 75% less than Claude Opus 5.5 at a 3:1 input-to-output mix. It’s the cheapest current frontier model from another family. Cheaper doesn’t mean as good: test it on your own tasks.
Compare Claude Opus 5.5 with DeepSeek V4 Pro
Similar price from another provider: Kimi K3, $3.00 / $15.00. Compare
Compare Claude Opus 5.5 with
Side by side: prices, cached and batch rates, and the cost of the same workload.
Other Claude Opus versions
Earlier Opus models (4.5 to 5) remain available at $5 / $25. Opus 4 and 4.1 were retired in 2026.
| Model | Input / 1M | Output / 1M | Cached input | Context | Released |
|---|---|---|---|---|---|
| $5.00 | $25.00 | $0.50 | 1M | 24 Jul 2026 | |
| $5.00 | $25.00 | $0.50 | 1M | Jun 2026 | |
| $5.00 | $25.00 | $0.50 | 1M | Apr 2026 | |
| $5.00 | $25.00 | $0.50 | 1M | Feb 2026 | |
| $5.00 | $25.00 | $0.50 | 200K | 24 Nov 2025 |
Version details
Claude Opus 5
Previous$5.00 / $25.00 per 1M tokenscached $0.50 · batch 50% off · 1M context · 128K max output
- Fast mode costs $10 / $50 per 1M tokens.
Newer option: Claude Opus 5.5 at $4.00 / $20.00. Checked 11 Nov 2026 against Anthropic pricing and Axios, 24 Jul 2026 .
Claude Opus 4.8
Previous$5.00 / $25.00 per 1M tokenscached $0.50 · batch 50% off · 1M context · 128K max output
Newer option: Claude Opus 5.5 at $4.00 / $20.00. Checked 11 Nov 2026 against Anthropic pricing .
Claude Opus 4.7
Previous$5.00 / $25.00 per 1M tokenscached $0.50 · batch 50% off · 1M context · 128K max output
- Anthropic says it will not retire this model before 16 April 2027.
Newer option: Claude Opus 5.5 at $4.00 / $20.00. Checked 11 Nov 2026 against Anthropic pricing and Anthropic model deprecations .
Claude Opus 4.6
Previous$5.00 / $25.00 per 1M tokenscached $0.50 · batch 50% off · 1M context · 128K max output
- Anthropic says it will not retire this model before 5 February 2027.
Newer option: Claude Opus 5.5 at $4.00 / $20.00. Checked 11 Nov 2026 against Anthropic pricing and Anthropic model deprecations .
Claude Opus 4.5
Previous$5.00 / $25.00 per 1M tokenscached $0.50 · batch 50% off · 200K context · 64K max output
Newer option: Claude Opus 5.5 at $4.00 / $20.00. Checked 11 Nov 2026 against Anthropic pricing .
Compare Claude Opus 5.5
Price history
All changes- ▼ 20%Claude Opus 5.5 launched at $4 / $20 per 1M tokens, 20% below Opus 5.
$5 / $25→ $4 / $20 Source - Anthropic retired Claude Opus 4.1. Source
- Anthropic launched Claude Opus 5 at $5 / $25. Source
- Anthropic retired Claude Opus 4 and Claude Sonnet 4. Source
Every dated price: price records · CSV. Cite as: AI Token Price, Claude Opus pricing, https://aitokenprice.com/pricing/claude-opus#price-history
Anthropic pricing rules
- Batch requests cost 50% less.
- Cache reads are billed at a per-model rate, usually a tenth of the input price or less. Cache writes cost 1.25× input for the 5-minute cache and 2× for the 1-hour cache.
- The full 1M-token context window is billed at standard rates on current models.
Retired Claude Opus models
- Retired 5 Aug 2026Claude Opus 4.1 was $15.00 / $75.00 per 1M tokens. Use Claude Opus 5.5 instead.
- Retired 15 Jun 2026Claude Opus 4 was $15.00 / $75.00 per 1M tokens. Use Claude Opus 5.5 instead.
Questions
How much does Claude Opus 5.5 cost?
As of 11 Nov 2026, Claude Opus 5.5 costs $4 per million input tokens and $20 per million output tokens, and $0.20 per million cached input tokens. Batch requests cost 50% less. Prices checked 11 Nov 2026.
What is Claude Opus 5.5's context window?
1M tokens, with up to 128K tokens of output.
Does Claude Opus 5.5 support prompt caching?
Yes. Repeated input read from the cache costs $0.20 per million tokens, 95% less than normal input.