StarSeaAPI
claude-opus-5 vs gpt-6-astra
| claude-opus-5 | gpt-6-astra | |
|---|---|---|
| Providers | Anthropic | OpenAI |
| Input $/M | $5.00 | $10.00 |
| Output $/M | $25.00 | $50.00 |
| Output multiplier | ×5.00 | ×5.00 |
| Context window | 1M tokens | 1.05M tokens |
| Intelligence index | 54.1 | 54.7 |
| Coding index | 78.0 | 76.9 |
What the numbers mean
claude-opus-5 is roughly 2.0× cheaper on input than gpt-6-astra. If your workload passes the quality bar on the cheaper model, that gap compounds across every request; route to gpt-6-astra deliberately rather than by default.
Measured intelligence index differs by only 0.6 points, which in practice means the two models are interchangeable on most tasks — pick on price and latency.
Tags: claude-opus-5 — Chat, Reasoning, Coding, Vision · gpt-6-astra — Chat, Reasoning, Coding, Vision
Code
from openai import OpenAI
client = OpenAI(base_url="https://starseaapi.com/v1", api_key="sk-...")
# claude-opus-5
client.chat.completions.create(model="claude-opus-5", messages=[{"role":"user","content":"Hi"}])
# gpt-6-astra
client.chat.completions.create(model="gpt-6-astra", messages=[{"role": "user", "content": "Hi"}])