- Score
- 8.6 (+2.07 points)
- Total Cost (Current Price)
- $0.061 · 94.5% cheaper
- Response Time (avg)
- 7.51s · 6.5% faster
Anthropic
Release: 2026-09-29
Tested on: 2026-09-30 22:57
anthropic/claude-sonnet-5.5::medium
~1T total (~100B active)MoEClosedEstimated
Summary
Claude Sonnet 5.5 scores 6.5 on AI BENCHY and ranks #215. It has 10.0 reliability, a 40.6% pass rate, $1.100 total cost, and 8.03s average response time.
What makes Claude Sonnet 5.5 unique: It stands out most in Agentic, where it ranks #1, while Coding is its weakest area at #17.
Recommended alternatives
We recommend choosing one of these models instead:
- Score
- 9.4 (+2.85 points)
- Total Cost (Current Price)
- $0.183 · 83.4% cheaper
- Response Time (avg)
- 6.24s · 22.3% faster
- Score
- 6.9 (+0.35 points)
- Total Cost (Current Price)
- $0.049 · 95.6% cheaper
- Response Time (avg)
- 6.96s · 13.3% faster
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.
6.5
Consistency
9.7
10.0
$1.100
Total Output Tokens
37,748
Total Input Tokens
361,183
Input Price
$2.000 / 1M
Output Price
$10.000 / 1M
Cache Read Price
$0.200 / 1M
Cache Write Price
$2.500 / 1M
Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.
Flaky tests
1
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.
#215 Claude Sonnet 5.5
medium- Cost
- $0.024
- Time
- 17.4s
- Tokens
- 2,525 tok
Price History
Historical pricing data for this model from OpenRouter.
| Date | Input Price | Output Price | Cache Read Price | Cache Write Price |
|---|---|---|---|---|
| 2026-10-01 18:33 | $2.000 / 1M | $10.000 / 1M | $0.200 / 1M | $2.500 / 1M |
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 |
|---|---|---|---|
| Agentic | 10.0 | 10.0 | |
| Anti-AI Tricks | 6.5 | 10.0 | |
| Coding | 3.4 | 9.7 | |
| Combined | 8.5 | 10.0 | |
| Data parsing and extraction | 6.5 | 10.0 | |
| Domain specific | 3.0 | 10.0 | |
| General Intelligence | 5.1 | 3.4 | |
| Instructions following | 6.3 | 10.0 | |
| Puzzle Solving | 7.7 | 10.0 | |
| Tool Calling | 10.0 | 10.0 | |
| Trivia | 3.0 | 10.0 |