#79 Claude Sonnet 5.5
xhigh- Cost
- $0.319
- Time
- 258.6s
- Tokens
- 31,969 tok
Anthropic
Release: 2026-09-29
Tested on: 2026-09-29 21:37
anthropic/claude-sonnet-5.5::xhigh
~1T total (~100B active)MoEClosedEstimated
Summary
Claude Sonnet 5.5 scores 8.3 on AI BENCHY and ranks #79. It has 10.0 reliability, a 78.8% pass rate, $1.069 total cost, and 13.17s average response time.
What makes Claude Sonnet 5.5 unique: It stands out most in Instructions following, where it ranks #1, while Domain specific is its weakest area at #15.
Model facts
Researched on 2026-09-29
- Parameters
- ~1T total (~100B active)
- Architecture
- MoE
- Availability
- Closed
- License
- -
Best estimate from public evidence; the vendor did not disclose every value. Vendor does not disclose parameter counts or architecture. Low-confidence catalog estimates carry forward the prior Claude Sonnet 5 family estimates; the announcement establishes identity and API availability, not these counts. Thinking is always on; OpenRouter lists low, medium, high, xhigh, and max efforts.
8.3
Consistency
8.7
10.0
$1.069
Total Output Tokens
77,105
Total Input Tokens
148,643
Input Price
$2.000 / 1M
Output Price
$10.000 / 1M
Flaky tests
4
Flaky tests had mixed outcomes across runs (at least one pass and one fail).
Hamster playing table tennis
Prompt: Create a detailed SVG illustration of a hamster playing table tennis.
Charts
Choose the first model, then click a second model to open a side-by-side page.
Top Models by Score
Score vs Total Cost
Response Time (avg)
Score vs Response Time (avg)
Total Output Tokens
Score vs Total Output Tokens
Quick Compare
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Category Breakdown
| Category | Score | Consistency | Tests Correct |
|---|---|---|---|
| Anti-AI Tricks | 10.0 | 10.0 | |
| Coding | 8.2 | 7.2 | |
| Combined | 8.7 | 6.9 | |
| Data parsing and extraction | 10.0 | 10.0 | |
| Domain specific | 2.9 | 7.2 | |
| General Intelligence | 6.5 | 3.4 | |
| Instructions following | 10.0 | 10.0 | |
| Puzzle Solving | 10.0 | 10.0 | |
| Tool Calling | 10.0 | 10.0 | |
| Trivia | 3.0 | 10.0 |