claude-opus-5.5 vs gpt-6-astra
Both run on onomeo with free credits. Everything below comes from calls made through this site.
- claude-opus-5.5
- 2 advantages
- gpt-6-astra
- 3 advantages
How to choose
claude-opus-5.5Faster: 1.4s on averageHigher in this week's ranking: #47
gpt-6-astraCheaper: about 3,948 a reply, 41% lessSteadier: 92% up over 3 daysSteadier this week: 86% of tests passed
claude-opus-5.5
By Anthropic
gpt-6-astra
By OpenAI
Where they differ
claude-opus-5.5gpt-6-astra
On this site
57%7 callsAvailability, last 3 days92%14 calls
66%9 testsAvailability, this week's tests86%22 tests
1.4sAverage response this week2.0s
6,732Credits per reply3,948
~29Replies a day's check-in buys~50
#47Place in this week's ranking#48
15×Credit multiplier20×
The model itself
1M tokensContext length1.1M tokens
Jun 2026Knowledge cutoffApr 2026
22 Sep 2026Released4 Sep 2026
Where they match
- Longest reply128K tokens
- Reads imagesYes
- Calls toolsYes
- Thinks before answeringYes
- Conversations used for trainingUsed to train and improve the provider’s models
- Open weightsNo
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. Replies a day assumes a full daily check-in and the daily call limit.
Compare next
claude-opus-5.5 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 Models are served by third-party providers and may slow down or be withdrawn; this page follows those changes.