claude-opus-5.5 vs gpt-6-astra
Both can be used on onomeo. Everything below comes from calls made through this site.
- claude-opus-5.5
- No edge in the figures
- gpt-6-astra
- No edge in the figures
How to choose
The figures from this site show no clear difference between the two yet.
claude-opus-5.5
By Anthropic
gpt-6-astra
By OpenAI
Where they differ
claude-opus-5.5gpt-6-astra
On this site
$30.00Reference price per million output tokens$75.00
$6.00Reference price per million input tokens$15.00
The model itself
1M tokensContext length1.1M tokens
Jun 2026Knowledge cutoffApr 2026
22 Sep 2026Released4 Sep 2026
$0.30Reference price per million cache-read tokens$1.50
Where they match
- Place in this week's rankingUnranked
- 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. Models marked as free are counted in calls; paid models are charged by usage, in US dollars.
Compare next
claude-opus-5.5 against other models
- vs muse-wonder-1.0$30.00Reference price per million output tokens
- vs kimi-k3$22.50Reference price per million output tokens
- vs gemini-4-argon$15.00Reference price per million output tokens
- vs kimi-k3.1-pro$15.00Reference price per million output tokens
- vs gpt-6.1-sol$15.00Reference price per million output tokens
- vs qwen3.8-max$9.00Reference price per million output tokens
gpt-6-astra against other models
- vs claude-fable-5.1$75.00Reference price per million output tokens
- vs claude-fable-5.2$60.00Reference price per million output tokens
- vs muse-wonder-1.0$30.00Reference price per million output tokens
- vs kimi-k3$22.50Reference price per million output tokens
- vs gemini-4-argon$15.00Reference price per million output tokens
- vs gpt-5.6-luna$1.80Reference price per million output tokens
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 Models are served by third-party providers and may slow down or be withdrawn; this page follows those changes.