MODEL PROOF
Claude Sonnet 5
BETTER VALUE OPTION
A stored alternative has an equal-or-higher measured score and an equal-or-lower price.
Muse Spark 1.3 · Δ score 47.5 points · 50% lower measured price · $2.00 / 1M tokens
Gemini 3.8 Flash is a further stored option with these losses: 128K → 66K max output
- Independent LMArena score
- 1,442.2 ± 4.58 · 35,301 votes
- Context window
- 1M
- Maximum output
- 128K
- Input modalities
- text, image, file
- Output modalities
- text
- Published input price
- $2.00 / 1M tokens
- Published output price
- $10.00 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Every price dimension · USD per million tokens
| Input | $2.00/M |
|---|---|
| Output | $10.00/M |
| Cached input | $0.200/M |
| Cache write | $2.50/M |
| Cache write 1h | $4.00/M |
| Reasoning | Unknown/M |
| Web search | $0.01/call |
| Batch discount | 50% |
Who sells it
The same weights, different shops. Cheapest is not like-for-like when serving precision differs.
10 provider offers · rates, limits and conditions
Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test.
| Seller | Input | Output | Precision | Uptime (1d) |
|---|---|---|---|---|
| Claude Platform on AWSclaude-on-aws Endpoint terms
| $2.00 | $10.00 | undeclared | 99.99% |
| Azureazure/global Endpoint terms
| $2.00 | $10.00 | undeclared | 99.83% |
| Googlegoogle-vertex/global Endpoint terms
| $2.00 | $10.00 | undeclared | 99.98% |
| Amazon Bedrockamazon-bedrock/global Endpoint terms
| $2.00 | $10.00 | undeclared | 99.97% |
| Anthropicanthropic Endpoint terms
| $2.00 | $10.00 | undeclared | 99.99% |
| Amazon Bedrockamazon-bedrock/eu-west-1 Endpoint terms
| $2.20 | $11.00 | undeclared | 100.00% |
| Azureazure/us Endpoint terms
| $2.20 | $11.00 | undeclared | 100.00% |
| Googlegoogle-vertex/us Endpoint terms
| $2.20 | $11.00 | undeclared | 100.00% |
| Googlegoogle-vertex/europe Endpoint terms
| $2.20 | $11.00 | undeclared | 99.99% |
| Amazon Bedrockamazon-bedrock/us-east-1 Endpoint terms
| $2.20 | $11.00 | undeclared | 100.00% |
Independent scores
| LMArena Elo | 1442.2high |
|---|
LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero.
Best rankings by task
- godotgamedev #3of 30 1238
- htmlslides #5of 23 1220
- agenticgamedev #7of 24 1227
- fullstack #8of 41 1258
- mobileapps #9of 40 1244
- androidnative #9of 35 1238
- webapps #10of 40 1250
- gamedev #13of 107 1308
Capability
| Context window | 1M |
|---|---|
| Max output | 128K |
| Input modes | text, image, file |
| Tool use | yes |
| Reasoning | optional |
| Open weights | no |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-09-23 |
| Quality data | verified |
| Cross-checked | vendor page |
Our take
editorial — not a measurementSonnet is worth evaluating for recurring production work such as retrieval, summarisation and tool use. Compare completed-task cost and reliability with the larger Claude options. Read the current price table and benchmark evidence for rates and measured capability.
Strengths
- Tool use and structured outputs are listed
- Cache and batch options are recorded
Weaknesses
- Family positioning does not prove performance on your hardest tasks
- Check current vendor terms rather than relying on an old introductory-price announcement
Reach for it when
- Retrieval and summarisation evaluations
- Recurring tool-assisted production workloads
Avoid it if
- Your own evaluations show a larger model is necessary
- You require downloadable weights
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
Questions this page answers
What does Claude Sonnet 5 cost?
$2.00/M in, $10.00/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription.
Does Claude Sonnet 5 have an independent quality score?
Claude Sonnet 5 has an LMArena score in this catalogue.
What beats Claude Sonnet 5?
Muse Spark 1.3 has an equal-or-higher measured score and an equal-or-lower price.
Does this page use Artificial Analysis scores for Claude Sonnet 5?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
MODEL MONUMENT
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The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not.
[](https://undominated.ai/models/anthropic__claude-sonnet-5/)<a href="https://undominated.ai/models/anthropic__claude-sonnet-5/"><img src="https://undominated.ai/badge/anthropic__claude-sonnet-5.svg" alt="Claude Sonnet 5 — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/anthropic__claude-sonnet-5.svg — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never
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