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claude-sonnet-5.5 vs step-3.7-flash:free

Both can be used on onomeo. Everything below comes from calls made through this site.

claude-sonnet-5.5
3 advantages
step-3.7-flash:free
2 advantages

How to choose

claude-sonnet-5.5Steadier this week: 100% of tests passedFaster: 1.5s on averageLonger context: 1M tokens
step-3.7-flash:freeHigher in this week's ranking: #19Open weights

claude-sonnet-5.5

By AnthropicNew this week

step-3.7-flash:free

By StepFun

Where they differ

claude-sonnet-5.5step-3.7-flash:free
On this site
—Availability, last 3 days79%94 calls
100%3 testsAvailability, this week's tests90%205 tests
1.5sAverage response this week2.1s
$0.0037Price per replyFree
#43Place in this week's ranking#19
$50.00Price per million charactersFree
The model itself
1M tokensContext length256K tokens
128K tokensLongest reply256K tokens
Used to train and improve the provider’s models.Conversations used for trainingThe provider does not say.
Jun 2026Knowledge cutoffMar 2026
28 Sep 2026Released29 May 2026
NoOpen weightsYes

Where they match

  • Reads imagesYes
  • Calls toolsYes
  • Thinks before answeringYes

Availability over 3 days counts every call made through the site; this week's availability counts every call over the last 7 days, scheduled tests included, and response time comes from the site's own scheduled tests. Free models are counted in calls; big models are charged by usage, in US dollars.

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Figures come from real calls made through this site. Models are served by third-party providers and may slow down or be withdrawn; this page follows those changes.