Claude Sonnet 5

API

Claude Sonnet 5 is a language model from Anthropic with a 1M-token context window. Provider list price is $3 per million input tokens and $15 per million output; on Allocate you pay $3.21 and $16.05. It is a closed model served over API; the weights are not published.

Route Claude Sonnet 5 Book a call

Pricing

Provider listOn Allocate

Input, per M tokens$3$3.21

Output, per M tokens$15$16.05

Prices checked 2026-07-21.

Price against its peers

Gemini 3.5 Flash$1.50$9

Gemini 3.6 Flash$1.50$7.50

Qwen2.5-VL (72B) Instruct$1.95$8

Gemini 3.1 Pro$2$12

Grok 4.6$2$6

Claude Sonnet 5$3$15

Kimi K3$3$15

DeepSeek R1 0528 NVFP4$3$7

InputOutput

Provider list prices per M tokens, Claude Sonnet 5 against its nearest language peers by price.

What a real workload costs

Take 1,000,000 requests a month at 1,200 input and 350 output tokens each: 1,200M input and 350M output tokens. At list prices that is 1,200 × $3 + 350 × $15 = $8,850 a month. Billed on Allocate it is $9,470.

Where it fits

Anthropic’s balanced flagship: careful reasoning with strong writing and judgment, and 1M tokens of context. The pick for customer-facing text where tone and safety carry real risk.

Judgment calls with policy context
Customer-facing writing
Review and escalation flows

Claude Sonnet 5 is served over API. Route traffic to it by name, meter every token, and swap it out in one click when a better fit ships.

Example usage

Point a route at anthropic/claude-sonnet-5 and the endpoint never changes; swap the model behind it whenever you want.

api.allocate.network

curl https://api.allocate.network/v1/chat/completions \
  -H "Authorization: Bearer $ALLOCATE_KEY" \
  -d '{
    "model": "anthropic/claude-sonnet-5",
    "messages": [{"role": "user",
      "content": "Summarise the attached contract."}]
  }'

200 · anthropic/claude-sonnet-5 · inside your boundary

Common questions

How much does Claude Sonnet 5 cost per million tokens?

Provider list price is $3 per million input tokens and $15 per million output tokens. On Allocate you pay $3.21 in and $16.05 out.

What context window does Claude Sonnet 5 have?

1,000,000 tokens (1M). At roughly 0.75 words per token, that is about 750k words of English text per request.

Can I fine-tune Claude Sonnet 5?

No. Claude Sonnet 5 is a closed model served over API; the weights are not published. If you want a model you can train and own, start from an open-weights base in the catalog and fine-tune that.

How do I call Claude Sonnet 5 on Allocate?

Send anthropic/claude-sonnet-5 in the model field of the OpenAI-compatible endpoint at api.allocate.network/v1, or point a route name (like prod/support-agent) at it so you can swap the model later without a deploy.