Anthropic
Claude Opus 4.1 (legacy)
model
claude-opus-4-1PremiumStableVisionStreamingVisionToolsBatchLong contextUnited States
Context
200K
Input / 1M tokens
$15.00
Output / 1M tokens
$75.00
Weighted tokens formula
1× provider × 17× tier
About this model
Claude Opus 4.1 (legacy)
Claude Opus 4.1 — earlier Opus generation with 200K context. Pin to this when you have specific version requirements; prefer 4.7 for new deployments.
Released
2024-08
Training cutoff
2024-07
Parameters
Not disclosed
Best for
Use cases
- ✓Version-pinned production deployments
Strengths
What it does well
- ●Stable + predictable behavior
Limitations
Know the trade-offs
- !Older generation — newer Opus matches or beats on most tasks
Code example
Chat completion with Claude Opus 4.1 (legacy)
from openai import OpenAI
client = OpenAI(
base_url="https://api.anoman.io/v1",
api_key="anm-sk-..."
)
response = client.chat.completions.create(
model="claude-opus-4-1",
messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)Weighted tokens
weighted_tokens = raw_tokens × 1 (provider) × 17 (tier)
Pro plan: 20M weighted tokens/month. Combined multiplier 17×: 1,176,471 raw tokens available.
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