Anthropic: Claude Sonnet 5.5
anthropic/claude-sonnet-5-5Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade.
Modalities
In / out per 1M$2.00 / $10
Context1M
ReleasedSep 28, 2026
Providers
8 providers serve this model upstream.
| Provider | Input /M | Output /M | Cache read /M | Latency P50 | Throughput P50 | Uptime |
|---|---|---|---|---|---|---|
 Google Vertexglobal | $2.00 | $10 | $0.10 | 2.66s | 113 tps | 100% |
 Azureglobal | $2.00 | $10 | $0.10 | 1.34s | 125 tps | 100% |
 Claude Platform on AWS | $2.00 | $10 | $0.10 | 2.19s | 96 tps | 100% |
| Anthropic | $2.00 | $10 | $0.10 | 2.20s | 98 tps | 100% |
| Google Vertexus | $2.20 | $11 | $0.11 | 0.89s | 102 tps | 100% |
| Azureeastus2 | $2.20 | $11 | $0.11 | 0.99s | 72 tps | 100% |
| Google Vertexeu | $2.20 | $11 | $0.11 | 1.19s | 102 tps | 100% |
 Amazon Bedrock | $2.00 | $10 | $0.10 | 2.58s | 81 tps | 99.94% |
Market-wide measurements, refreshed every 15 minutes. They describe who serves Claude Sonnet 5.5 in general, not how ProjectCOZY routes your requests.
Pricing
List rates per 1M tokens — what Claude Sonnet 5.5 costs pay-as-you-go elsewhere, not what you pay here.
Input
$2.00
per 1M tokens
Output
$10
per 1M tokens
Cache read
$0.10
per 1M cached tokens
Included in every pass
Claude Sonnet 5.5 is included in every ProjectCOZY pass at no extra cost — one flat rate, no per-token metering. The rates above are there for comparison.
Performance
Time to first token and output speed across every provider, over the last 3 days.
0.0s5.0s10.0s15.0s20.0s
Oct 17, 12 AMOct 17, 8 AMOct 17, 4 PMOct 18, 12 AMOct 18, 8 AMOct 18, 4 PMOct 19, 12 AMOct 19, 8 AMOct 19, 4 PMOct 20, 12 AMOct 20, 8 AM
Google Vertex (us) Amazon Bedrock Azure (global) Anthropic Google Vertex (global) Claude Platform on AWS Google Vertex (eu) Azure (eastus2)
0 tok/s250 tok/s500 tok/s750 tok/s1000 tok/s
Oct 17, 12 AMOct 17, 8 AMOct 17, 4 PMOct 18, 12 AMOct 18, 8 AMOct 18, 4 PMOct 19, 12 AMOct 19, 8 AMOct 19, 4 PMOct 20, 12 AMOct 20, 8 AM
Google Vertex (us) Amazon Bedrock Azure (global) Anthropic Google Vertex (global) Claude Platform on AWS Google Vertex (eu) Azure (eastus2)
Uptime
100% of requests were served successfully over the last 3 days, across all providers.
Last 3 daysAvailability 99.96%
Oct 17, 10:00 AMNow
Availability over the last 24 hoursAvailability 99.95%
100% 98% 97% 95%
Oct 19, 10:40 AMNow
Apps
Tools that most often run Claude Sonnet 5.5, by tokens this week.
Activity
6197.0B tokens processed market-wide in the last month.
0200.0B400.0B600.0B800.0B
Sep 28Oct 3Oct 8Oct 13Oct 18
Tokens
FAQ
Which model id do I use for Claude Sonnet 5.5?
anthropic/claude-sonnet-5.5. Send it as the model field from any OpenAI-compatible client, against https://projectcozy.tech/v1.
How much context does Claude Sonnet 5.5 hold?
1,000,000 tokens per request, of which up to 128,000 can be the response.
What can it accept and return?
Input: text, image, file. Output: text.
What does Claude Sonnet 5.5 cost on a pass?
Nothing beyond the pass itself. Pay-as-you-go elsewhere it lists at $2.00 per 1M input tokens and $10 per 1M output tokens.
Who built Claude Sonnet 5.5?
Anthropic, in the Claude family.
Explore
Other models your pass can call.
