gemini-3.5-flash vs gpt-oss-20b
Both can be used on onomeo. Everything below comes from calls made through this site.
- gemini-3.5-flash
- 2 advantages
- gpt-oss-20b
- 5 advantages
How to choose
gemini-3.5-flashLonger context: 1M tokensReads images
gpt-oss-20bSteadier: 99% up over 3 daysSteadier this week: 98% of tests passedFaster: 1.2s on averageHigher in this week's ranking: #4Open weights
gemini-3.5-flash
By Google
gpt-oss-20b
By OpenAI
Where they differ
gemini-3.5-flashgpt-oss-20b
On this site
68%50 callsAvailability, last 3 days99%115 calls
73%121 testsAvailability, this week's tests98%204 tests
8.5sAverage response this week1.2s
#14Place in this week's ranking#4
The model itself
1M tokensContext length128K tokens
64K tokensLongest reply32K tokens
YesReads imagesNo
Jan 2025Knowledge cutoffJun 2024
19 May 2026Released5 Aug 2025
NoOpen weightsYes
Where they match
- Price per replyFree
- Calls toolsYes
- Thinks before answeringYes
- Conversations used for trainingUsed to train and improve the provider’s models
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.
Compare next
gemini-3.5-flash against other models
gpt-oss-20b against other models
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 Models are served by third-party providers and may slow down or be withdrawn; this page follows those changes.