Models/Anthropic/Claude Sonnet 5

Claude Sonnet 5

Working default Claude 5. 1.08T this week (+5% WoW, not share). Continuum hosts claude-sonnet-5. Official $2 / $10 is now the standard price. AA 55; vals hero 59.61% ±1.15. No official DeepSWE row.

01

Identity

1,000,000Context in
128,000Context out
2026-06-30 (OpenRouter created 1782843083)Released
ProprietaryWeights
Canonical name
Claude Sonnet 5
Aliases
sonnet, claude-sonnet-5, continuum/claude-sonnet-5
Continuum hosted id
claude-sonnet-5
OpenRouter slug
anthropic/claude-sonnet-5
Hugging Face
None (closed or unpublished)
Modalities
text, image, file
Closed weights Hosted on Continuum Vendor lab

Closed. Same 1M / 128k window as Opus 5 and Fable 5. OpenRouter catalog created unix 1782843083 (30 Jun 2026).

Anthropic pricing.md (19 Aug 2026) says the $2 / $10 introductory rate is now the standard price and the scheduled $3 / $15 increase will not occur.

02

Should I use this for coding agents

Use Sonnet 5 as the everyday Claude. AA Intelligence Index 55; vals hero 59.61% ±1.15. Escalate to Opus or Fable only after this SKU failed. We do not invent a DeepSWE percent. The 13 Aug family notes name Fable and Opus, not Sonnet.

DeepSWE

No official DeepSWE mini-swe-agent row for this identity on the public board we fetched.

omitted, not invented as of 2026-08-13 source
Artificial Analysispublished integer
55
bench
Artificial Analysis
version
Intelligence Index
harness
published integer
metric
Intelligence Index
value
55
independent as of 2026-08-19 source
Vals Indexvals.ai card
59.61%
bench
Vals Index
version
hero index
harness
vals.ai card
metric
Vals Index
value
59.61%
independent as of 2026-08-19 source

vals.ai Accuracy Rankings hero for Sonnet 5, fetched 19 Aug 2026: 59.61% ±1.15. Not DeepSWE.

Ranked view: Best coding models: the independent leaderboard puts this row and every other card that carries an independent coding score on one board, with the confidence intervals left visible.

Named benches, printed only

Copied from AA or vals HTML we opened. 0.0% placeholder bars are omitted. Do not average these into the hero tiles, and do not invent CI, $/task, or steps for Artificial Analysis.

BenchPrintedNoteSourceURLAs of
AA throughput 79 tok/s Printed Speed row. Artificial Analysis Claude Sonnet 5 source 2026-08-19
AA Index eval cost $4,010.51 Printed Index-eval total. Not DeepSWE $/task. Artificial Analysis Claude Sonnet 5 source 2026-08-19
03

When not to use it

Trust this before you buy

  • No official DeepSWE row. vals 59.61% ±1.15 is not DeepSWE.
  • Need the reasoning flagship. Opus 5 is DeepSWE 74% ±4, $11.84/task. Need the long-run SKU. Fable 5 is DeepSWE 70% ±4, $21.63/task.
  • Closed weights. Anthropic’s data-retention policy does not allow zero data retention.

Plus is $25/mo with $25 weekly hosted usage. The Mac app stays free with your own keys. Get Plus is not Download for Mac.

04

Artifact

Weights

Anthropic does not publish Sonnet 5 weights. No HF Files button. Get Plus is hosted inference.

  • Official Anthropic pricing.md, fetched 19 Aug 2026: Sonnet 5 $2 input / $2.50 5-minute cache write / $4 1-hour write / $0.20 hits / $10 output. The $2 / $10 pair is now standard; the scheduled $3 / $15 increase will not occur.
  • OpenRouter catalog 19 Aug 2026: $2 / $10, cache read $0.20 /M, cache write $2.50 /M, web search $0.01 per call.

What you can open

Lab card and OpenRouter listing only. No Hugging Face Files button, because there is no official repo to point at.

Fetched OpenRouter catalog on 2026-08-19. hugging_face_id was empty.

05

Continuum serving

Continuum hosts claude-sonnet-5 on the 19 Aug 2026 bundled allowlist, with Opus 5 and Fable 5.

Continuum hosted id claude-sonnet-5

click to select

We list first-party and OpenRouter, plus Continuum only when the live public allowlist named the id. This is not a 15-host routing table.

06

Economics

No DeepSWE $/task: that board has no Sonnet 5 row.

Official Anthropic + OpenRouter catalog, 19 Aug 2026: $2 / $10 per million. Cache read $0.20 /M. Cache write $2.50 /M (1-hour write $4 official). Opus is $5 / $25. Fable is $10 / $50.

Price this model Opens the pricing calculator preloaded with Claude Sonnet 5.

On a Claude plan? The plan picker models the weekly caps.

Artificial Analysis Intelligence Index 55 at max, fetched 19 Aug 2026. Same page: 79 output tokens/s; $4,010.51 to run the Index. The tile is the published integer 55.

07

Provenance

ClaimSourceAs of
Official Sonnet 5 $2 / $2.50 5m write / $4 1h write / $0.20 hits / $10; $2/$10 now standardAnthropic pricing.md2026-08-19
OR catalog $2 / $10, cache r/w $0.20 / $2.50, search $0.01, 1,000,000 / 128,000, created 1782843083OpenRouter catalog2026-08-19
AA Index 55 (max); 79 tok/s; $4,010.51 Index evalArtificial Analysis Claude Sonnet 52026-08-19
vals Accuracy 59.61% ±1.15vals.ai Accuracy Rankings 2026-08-192026-08-19
Hosted id claude-sonnet-5Continuum HostedKeyProvider bundled catalog2026-08-19
1.08T week tokens (+5% WoW)OpenRouter rankings This Week2026-08-19
OpenRouter id anthropic/claude-sonnet-5, context 1,000,000OpenRouter /api/v1/models2026-08-19
08

Compare, FAQ, and Get Plus

No other card in this cluster shares a published DeepSWE official row we can put next to this one. We will not compare on vendor-blog numbers.

Continue through Anthropic's model family with Claude Opus 5 (Fast).

FAQ

Did Sonnet stay at $3 / $15?

No. Anthropic pricing.md on 19 Aug says $2 / $10 is now the standard price and the scheduled increase will not occur.

Why no DeepSWE chip?

The 13 Aug official-board family notes name Fable 5 and Opus 5, not Sonnet 5. Omitting is the rule.

Why does the lab blog disagree with DeepSWE or Scale?

Lab posts pick a harness, an effort, a split, and sometimes a private eval set. DeepSWE publishes the official mini-swe-agent row with cost, tokens, and steps. Scale SWE-bench Pro only counts when the public shared-harness board has a row we can fetch. A higher lab number is usually a different test, not a better one.

OpenAI-compatible call

Verified against the live public allowlist on 2026-08-19. Base URL is https://continuumcode.ai/v1. Keys are cont_sk_ from Settings, Account, Inference API. Personal keys need Plus or above.

curl https://continuumcode.ai/v1/chat/completions \
  -H "Authorization: Bearer $CONTINUUM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"claude-sonnet-5","messages":[{"role":"user","content":"Review this diff."}]}'

Plus is $25/mo with $25 weekly hosted usage. The Mac app stays free with your own keys. Get Plus is not Download for Mac.