Models/Anthropic/Claude Opus 5

Claude Opus 5

Opus 5 is the Anthropic reasoning flagship. Continuum hosts claude-opus-5. It is the right escalate, not the right default.

01

Identity

1,000,000Context in
128,000Context out
2026-07-24 (OpenRouter created)Released
ProprietaryWeights
Canonical name
Claude Opus 5
Aliases
opus, claude-opus-5, continuum/claude-opus-5
Continuum hosted id
claude-opus-5
OpenRouter slug
anthropic/claude-opus-5
Hugging Face
None (closed or unpublished)
Modalities
text, image, file
Plan mapping
Claude Max / Team / API. Opus has its own weekly allowance on several Anthropic plans; switching away keeps the rest of the week usable.
Closed weights Hosted on Continuum Vendor lab

Same 1M / 128k window as Fable 5 and Sonnet 5 on the OpenRouter catalog. Effort ladder low through max, default high.

02

Should I use this for coding agents

Use Opus when Sonnet already failed, or when the decision is architectural. DeepSWE official puts Opus at 74% Pass@1 ±4% at max, $11.84 per task, 118k output, 99 steps: the top row on that board the day we fetched it.

DeepSWEmini-swe-agent
74%±4%
bench
DeepSWE
version
v1.1
split
public 113 tasks
harness
mini-swe-agent
effort
max
n
113
metric
Pass@1
value
74%
ci
±4%
$/task
$11.84
tokens
118k out
steps
99
independent as of 2026-08-13 source
Artificial Analysispublished integer
63
bench
Artificial Analysis
version
Intelligence Index
harness
published integer
metric
Intelligence Index
value
63
independent as of 2026-08-19 source
Vals Indexvals.ai card
67.21%
bench
Vals Index
version
hero index
harness
vals.ai card
metric
Vals Index
value
67.21%
independent as of 2026-08-19 source

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.

03

When not to use it

Trust this before you buy

  • Do not leave Opus selected for mechanical edits. Sonnet 5 at $2 / $10 finishes most coding at a fraction of the quota burn.
  • Sibling: Fable 5 if the run must stay coherent across sittings and you accept $21.63 DeepSWE tasks. Sonnet 5 is the working default. Haiku 4.5 (not carded here) for fully specified mechanical work.
  • Closed weights. Anthropic’s data-retention policy does not allow zero data retention. You cannot air-gap the parameters.
  • Official DeepSWE row is max. Default effort is high. If you have not tried Sonnet at high, do not start here.

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 Opus 5 weights. No official HF repo. Get Plus is hosted inference.

  • Official Anthropic pricing.md, fetched 19 Aug 2026: Opus 5 $5 input / $6.25 5-minute cache write / $10 1-hour cache write / $0.50 cache hits / $25 output per million.
  • OpenRouter catalog 19 Aug 2026: $5 / $25, cache read $0.50 /M, cache write $6.25 /M, 1-hour cache write $10 /M, web search $0.01 per call. Same table as official, plus the search field.
  • Anthropic’s overview.md (19 Aug 2026) names Opus 5 as the start-here for complex agentic coding; Fable 5 for the highest available capability. That is vendor guidance, not a DeepSWE ranking.

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-opus-5 on the live public allowlist (19 Aug 2026). First-party Claude Code on your Anthropic login is unchanged.

Continuum hosted id claude-opus-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

DeepSWE official: $11.84 per task at max (118k out, 99 steps). That is the hero economics number.

Official Anthropic + OpenRouter catalog, 19 Aug 2026: $5 / $25 per million. Cache read $0.50 /M. Cache write $6.25 /M (1-hour write $10 /M). Web search $0.01 per call on the catalog. Sonnet 5 is $2 / $10. Fable 5 is $10 / $50.

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

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

Artificial Analysis footnote, 19 Aug 2026: about $2.34 per AA task, 56.9 tok/s. The AA tile is Intelligence Index 63. AA did not publish a DeepSWE-style CI or step count we will copy onto the chip. Do not average AA cost with DeepSWE $11.84/task.

07

Provenance

ClaimSourceAs of
DeepSWE 74% ±4% at maxDeepSWE official board2026-08-13
Official Opus 5 $5 / $6.25 5m write / $10 1h write / $0.50 hits / $25 outAnthropic pricing.md2026-08-19
OR catalog $5 / $25, cache read $0.50, write $6.25, 1h write $10, search $0.01OpenRouter catalog2026-08-19
Hosted id claude-opus-5GET /v1/chat/hosted/models/public2026-08-19
2.68T week tokens (+89% WoW)OpenRouter rankings This Week2026-08-19
OpenRouter id anthropic/claude-opus-5, context 1,000,000OpenRouter /api/v1/models2026-08-19
08

Compare, FAQ, and Get Plus

Same official DeepSWE harness (mini-swe-agent, public 113 tasks), fetched 2026-08-19. Different effort labels are the lab's own setting on that board, shown here rather than normalized.

Continue through Anthropic's model family with Claude Sonnet 5.

FAQ

Is Opus worth it over Sol?

On DeepSWE official they are inside each other’s confidence interval (74% ±4 vs 73% ±3) and Opus costs more per task ($11.84 vs $8.39). Pick on product fit and which subscription you already pay for, not on a one-point gap.

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-opus-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.