claude-opus-5.5 vs gpt-5.6-terra
Both run on onomeo with free credits. Everything below comes from calls made through this site.
- claude-opus-5.5
- No edge in the figures
- gpt-5.6-terra
- 4 advantages
How to choose
claude-opus-5.5No edge in the figures
gpt-5.6-terraCheaper: about 251 a reply, 96% lessSteadier: 100% up over 3 daysSteadier this week: 100% of tests passedHigher in this week's ranking: #43
claude-opus-5.5
By Anthropic
gpt-5.6-terra
By OpenAI
Where they differ
claude-opus-5.5gpt-5.6-terra
On this site
57%7 callsAvailability, last 3 days100%5 calls
66%9 testsAvailability, this week's tests100%11 tests
1.4sAverage response this week1.3s
6,732Credits per reply251
~29Replies a day's check-in buys~288
#47Place in this week's ranking#43
15×Credit multiplier6×
The model itself
1M tokensContext length1.1M tokens
Jun 2026Knowledge cutoffFeb 2026
22 Sep 2026Released9 Jul 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 Models are served by third-party providers and may slow down or be withdrawn; this page follows those changes.