UCP PlaygroundClaude Sonnet 5/Models/Claude Sonnet 5
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AnthropicAnthropic

Claude Sonnet 5

Anthropic's latest balanced model (Claude Sonnet 5, succeeding the Sonnet 4.x line). Newly added — Playground benchmark metrics are still being gathered. The Sonnet line historically pairs a strong multi-turn checkout flow with faster, more token-efficient responses than Opus.

Avg Tokens229,763Avg Duration45.5sTurns to Checkout23.9
CheckoutCartSearchTurnsTokens7.752.991.600
Shopping Score23/100
Weak

Scores computed from real agent sessions against live UCP-enabled stores. Not estimated — every data point is from an actual tool call, checkout attempt, and store response.

Shopping Score Breakdown

Checkout Rate40%7.7%
Cart Rate20%52.9%
Search Rate10%91.6%
Turn Efficiency15%0%
Token Efficiency15%0%
8.4% of sessions failed with errors.

Top Stores

StoreCheckout %Cart %
••••••••••••••••80%100%
••••••••••••••••46.2%100%
••••••••••••••••20%20%
••••••••••••••••0%0%
••••••••••••••••0%0%
••••••••••••••••0%0%
awaytravel.com0%100%
mypetcarnivore.com0%100%
atomicgardenoakland.com0%100%
egyptianlinens.com0%100%

Known Issues

Metrics Pendinglow

Claude Sonnet 5 was recently added; its Playground benchmark metrics are still being gathered.

Token Usage

Avg per Session229,763
Fleet Average74,927
vs Fleet+207%
Median (p50)106,752
p90431,714
Prompt / Completion split
Prompt 227,946 (99%) Completion 1,816 (1%)
Daily Average Tokens (last 30 days)
Distribution range
Min0p2550,828p50106,752p75200,447p90431,714Max4,631,643

Test Claude Sonnet 5 on Your Store

Run a live agent session to see how Claude Sonnet 5 handles your store's checkout flow end-to-end.

Run Agent Session

Compare With Other Models

MetaMetaLlama 3.3 70B39.3%GoogleGoogleGemini 3.5 Flash38.1%AnthropicAnthropicClaude Sonnet 4.634.7%xAIxAIGrok 4.326.3%GoogleGoogleGemini 2.5 Flash23.3%AnthropicAnthropicClaude Opus 4.822.3%AlibabaAlibabaQwen 3.8 Flash22.2%DeepSeekDeepSeekDeepSeek V3.220.7%GoogleGoogleGemini 2.5 Pro19.8%GoogleGoogleGemini 3.1 Pro19.6%OpenAIOpenAIGPT-4o15%DeepSeekDeepSeekDeepSeek V4.1 Flash14.3%xAIxAIGrok 3 Mini (Reasoning)11.1%OpenAIOpenAIGPT-5.510.2%OpenAIOpenAIo4-mini (Reasoning)9.1%AnthropicAnthropicClaude Opus 59%xAIxAIGrok 4.58.1%AnthropicAnthropicClaude Sonnet 57.7%DeepSeekDeepSeekDeepSeek V4 Pro7.7%DeepSeekDeepSeekDeepSeek V4 Flash7.5%GoogleGoogleGemini 3.8 Flash6.7%DeepSeekDeepSeekDeepSeek R1 (Reasoning)3.6%Moonshot AIMoonshot AIKimi K33.1%AlibabaAlibabaQwen 3.7 Max2.6%MetaMetaLlama 4 Maverick2.3%GoogleGoogleGemini 3.6 Flash1.1%GoogleGoogleGemini 3.7 Flash0%OpenAIOpenAIGPT-6 Luna0%MetaMetaMuse Spark 1.30%AlibabaAlibabaQwQ 32B (Reasoning)0%
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