anoman

Anthropic

Claude Sonnet 4.5 (legacy)

modelclaude-sonnet-4-5
MidStableVisionStreamingVisionToolsBatchLong contextUnited States

Context

200K

Input / 1M tokens

$3.00

Output / 1M tokens

$15.00

Weighted tokens formula

1× provider × 4× tier

About this model

Claude Sonnet 4.5 (legacy)

Claude Sonnet 4.5 — previous-generation Sonnet. Use this for version pinning when auto-following Sonnet upgrades is not desired.

Released

2024-10

Training cutoff

2024-09

Parameters

Not disclosed

Best for

Use cases

  • Production deployments pinned to a Sonnet version

Strengths

What it does well

  • Stable across upgrades
  • Same workhorse quality as 4.6 for most tasks

Limitations

Know the trade-offs

  • !Slightly weaker on hard tasks vs 4.6

Code example

Chat completion with Claude Sonnet 4.5 (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-sonnet-4-5",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

Weighted tokens

weighted_tokens = raw_tokens × 1 (provider) × 4 (tier)

Pro plan: 20M weighted tokens/month. Combined multiplier 4×: 5,000,000 raw tokens available.

Alternatives

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Workloads that fit Claude Sonnet 4.5 (legacy) often fit these too. Compare benchmarks and pricing before locking in a default.

Use Claude Sonnet 4.5 (legacy) through Anoman.