AnthropicProprietaryReleased Sep 22, 2026Claude Opus 5.5 pricing, benchmarks and cost analysis
Epoch Capabilities Index (ECI)range 165.3 to 173.9Top of the index
Throughput not measured for this model
In $4.00Out $20.00 per 1MCache discount 95%
Context window, tokens
Ranks are among the 101 models we track (intelligence = Epoch Capabilities Index by Epoch AI, CC BY 4.0; intelligence and speed: among those with data; cost: #1 is cheapest). Monthly cost uses the default workload of 2,000 input and 500 output tokens, 10,000 requests a day, 40% cached.
Comparison summary
On the default workload (2,000 input and 500 output tokens, 10,000 requests a day, 40% cached), Claude Opus 5.5 comes to $4,488 a month, 414% above the $873 median of the 101 models we track. It ranks #87 of 101 on cost, where #1 is the cheapest.
It scores 168.8 on the Epoch Capabilities Index (#1 of 66). Among the 2 other models within 2 points, 1 costs less, and it costs 34% less than their median ($6,792). Among stable-priced models, nothing that scores as high on ECI is cheaper for this workload.
Cached input is 95% cheaper than fresh input, a bigger discount than the 90% median. It is a proprietary model served by Anthropic. The batch API cuts the default workload to $2,244 a month.
Technical specifications
- Context window
- 1M tokens
- Input price
- $4.00 / 1M
- Cached input price
- $0.200 / 1M
- Output price
- $20.00 / 1M
- Cache discount
- 95%
- Batch API
- Available
- Batch input / cached / output
- $2.00 / $0.100 / $10.00
- Open weights
- No
- Release date
- Sep 22, 2026
- Price volatility
- Stable
Benchmarks
Best score for this model on each leaderboard, ranked against the other models listed there.
Your monthly bill
Standard
$4,488 / month- Input
- $1,440.00
- Cached input
- $48.00
- Output
- $3,000.00
Batch
$2,244 / month- Input
- $720.00
- Cached input
- $24.00
- Output
- $1,500.00
On the default workload the batch API costs $2,244 a month against $4,488 standard.
Price history
No price changes since we started tracking on Jul 13, 2026.
Cheaper alternatives
Models with stable pricing and a Epoch Capabilities Index within 2 points of Claude Opus 5.5 (or higher) that cost less for the default workload.
