Anthropic

Anthropic

Claude Sonnet 5

Anthropic's balanced tier. 1M context, vision, file input, prompt caching, extended reasoning.

Modalities

Text+Image → Text

Below release

Not established

Weights

Not published

Where it sits in the catalogue Kyma measures

Every number against every text model Kyma prices per token — a stated rule, not a chosen line-up.

Price · input#54/69

$2.70

output $13.50 · cached $0.27

median $1.009 · best $0.0494

Price · output#56/69

$13.50

per 1M tokens generated

median $3.528 · best $0.2164

Availability · 30d#48/68

91.07%

661 observations since 2026-08-01

median 93.2% · best 100.0%

Throughput#62/67

16.7 tok/s

probe median, one fixed prompt

median 39.7 tok/s · best 324.4 tok/s

Response time#56/67

4.56 s

probe median, to a complete answer

median 2.54 s · best 0.86 s

Context

1M

max output 128,000

published by Anthropic, not measured here

Tick above each rail is this model, below it the other 68. Dashed rule is the field median, solid is its best. Better is left; the axis stops at the 90th percentile, so a few models sit past its right edge.

Usage

How much this model is actually called here.

Rank

#42

of 98 active models

Tokens served

3.3M

all-time

Platform share

0.1%

of all tokens

Tokens · last 15 daysSep 1Sep 15

How it behaves under real clients

The same model answering different prompt shapes — measured, not benchmarked.

ClientRequestsTokensThroughputTo first tokenp95 totalCompleted
Node.js App104505.6K45 tok/s6.81 s31 s81.7%

Grouped by the client that sent the request. Not a benchmark: the same model on different prompt shapes. Throughput and time-to-first-token are medians; p95 is the slowest response in twenty. 1 client under 100 requests not shown.

Two clocks, and why they disagree

Kyma measures this model twice. Both are real; they answer different questions.

Probe · every 6h · 30 days

4.56s to answer

One fixed prompt, on a schedule, to every model. Comparable, because the model is the only thing that changes.

Observations
661
Answered by a substitute
35

Real traffic · last 7 days

8.12s to answer

Your requests, at the lengths clients actually send. Not comparable between models, but it is what running this one feels like.

Requests
84
Completed
98.8%
p95
34.2 s

Caching, as realised · last 7 days

9.3% of input cached

The share of input that actually hit cache, so the effective rate below is what was charged, not a best case.

Cached input
12.2K
Fresh input
118.4K
List input
$2.70 /1M
Effective input
$2.473642 /1M

The gap is prompt length, not the model degrading. Use the probe figure to choose between models, the traffic figure to budget for your own.

Pricing

Pay per token. Cached input bills at this model’s own cached rate, listed below.

$2.70 /1M input$13.50 /1M output
Hobby10 req/day · 2K in / 500 out
~$3.65/mo
Production1,000 req/day · 2K in / 500 out
~$365/mo
Scale20,000 req/day · 2K in / 500 out
~$7,290/mo
+ Estimate your workload
1,000
2,000
500
30%

Estimated monthly cost

$321

$10.69 / day on Claude Sonnet 5

Same workload on:

Claude Fable 5.1$1,823+468%
Claude Fable 5$1,823+468%

Estimates use list pricing with cached input at this model's own cached rate. Actual bills depend on real token counts, and every response includes its exact cost.

How it compares

Against the peers people actually weigh it against.

SpecClaude Sonnet 5Claude Fable 5.1Claude Fable 5
Input /1M$2.70$13.50$13.50
Output /1M$13.50$67.50$67.50
Context1M1M1M
ToolsYesYesYes
ReasoningYesYesYes
Throughput16.7 tok/s12.9 tok/s16.3 tok/s

Quick start

Up and running in under two minutes.

  1. 1

    Create an API key

    Sign up and grab a key from the dashboard. Claude Sonnet 5 needs a top-up — the signup credit covers the free tier.

    Get API key →
  2. 2

    Make your first request

    Drop in your key and send a chat completion — fully OpenAI-compatible.

    curl https://kymaapi.com/v1/chat/completions \
      -H "Authorization: Bearer YOUR_API_KEY" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "claude-sonnet-5",
        "messages": [
          {"role": "user", "content": "Explain prompt caching in one paragraph."}
        ]
      }'
  3. 3

    Stream responses

    Add "stream": true to receive tokens as they arrive.

    curl https://kymaapi.com/v1/chat/completions \
      -H "Authorization: Bearer YOUR_API_KEY" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "claude-sonnet-5",
        "stream": true,
        "messages": [{"role": "user", "content": "Hello!"}]
      }'

FAQ

Common questions about this model.

What is the context window of Claude Sonnet 5?

Claude Sonnet 5 has a 1M-token context window — roughly 1471 pages of text in a single request.

How much does the Claude Sonnet 5 API cost?

$2.70 per 1M input tokens and $13.50 per 1M output tokens, with cached input at $0.27/1M — 90% off the input rate on repeated prompt prefixes. No subscription; you pay only for what you use.

Does Claude Sonnet 5 support function calling?

Yes — Claude Sonnet 5 supports tool/function calling and structured outputs (JSON mode), so it works with agent frameworks out of the box.

Are the weights for Claude Sonnet 5 publicly available?

No. Anthropic does not publish Claude Sonnet 5's weights — it is reachable through an API rather than as a file you can download and run (https://www.anthropic.com/transparency, read 2026-08-14). That is Anthropic's decision about their own product, not a limitation of Kyma.

Is Claude Sonnet 5 ever served below the precision its creator released it at?

Kyma cannot say, and for this model nobody can. Anthropic does not publish Claude Sonnet 5's weights, so there is no released checkpoint whose precision a route could be measured against. We publish "not established" rather than reading a low format as a downgrade: on several models in this catalogue a low format is exactly how the creator ships it.

How do I use Claude Sonnet 5?

Kyma is OpenAI-compatible: point your SDK's base URL at https://kymaapi.com/v1, use your Kyma API key, and set the model to claude-sonnet-5. Signing up is free, but this model needs a top-up: the $0.50 signup credit covers the free tier only.

Needs a top-up — the signup credit covers the free tier.Create account →

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