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Anthropic · tested in Taskade Genesis

Claude Opus 5.5 in Taskade

Claude Opus 5.5 from Anthropic runs on Pro and up, with your own API key. We last tested it on Sep 30, 2026 in TSK-1, our app-building test.

Status
Own key
Plan
Pro and up, with your own API key (BYOK)
Where to pick it
Agent settings
Your own key
Anthropic
Last test
Context window
1Mtokens
Max output
128Ktokens
Released
Knowledge cutoff
Where it runs
7services

TSK-1 scorecard for the Claude family

TSK Score

Claude family, across real apps made in Taskade Genesis

TSK Score 75 out of 100
Claude family on the four TSK-1 axesInterfaceTaskMemoryAdapt
Interfaceready to share
Strong
Taskcompletes your task
Strong
Memorykeeps your data
Emerging
Adapthandles follow-up edits
Leading

The newest Claude we test.

More

On a family intake form it saved every answer and both photos, turned away an oversized photo before the upload, and was the only build of its test to open in the warm cream look the request asked for.

Claude on TSK-1

Published scores

Benchmark scores that Anthropic and test sites published for Claude Opus 5.5. Taskade did not re-run them. Lab-reported marks a score from Anthropic itself.

Published benchmark scores for Claude Opus 5.5, with sources
BenchmarkScore
Terminal-Benchv4.0 · xhigh effort; production safeguards with fallback · AnthropicLab-reported66.4
OSWorldpartial score · v2.0 · max effort; production safeguards with fallback · AnthropicLab-reported81.8
Humanity's Last Exammax effort; with tools; production safeguards with fallback · AnthropicLab-reported67.7
More published scores (6)
Published benchmark scores for Claude Opus 5.5, with sources: More published scores (6)
BenchmarkScore
FrontierCodev1.1 · max effort; production safeguards with fallback · Main · AnthropicLab-reported54.4
CursorBenchv4.0 · max effort; production safeguards with fallback · AnthropicLab-reported57.8
GDPval-AAElo · v2.1 · max effort; production safeguards with fallback · AnthropicLab-reported1,846
AutomationBenchpass rate · max effort; production safeguards; no fallback · AnthropicLab-reported40%
Terminal-Bench-Sciencev0.1 · max effort; production safeguards with fallback · AnthropicLab-reported58.7
Chartographymax effort; with tools; production safeguards with fallback · AnthropicLab-reported89
How Claude builds apps in TSK-1, our own test

Scores collected by models.dev (MIT). Each source links the page that published the score.

Versions tested

Open a version to read its findings. We ran these tests with an API key from the lab.

Claude Opus 5.5Tested Sep 20264 findings

The newest Claude we test. On a family intake form it saved every answer and both photos, turned away an oversized photo before the upload, and was the only build of its test to open in the warm cream look the request asked for.

Sep 22, 2026

Asked where the weekly recap should go and who would use the tracker before it built, then built three pages and a coaching automation that wrote a note into a logged match, at a far higher cost than the economical models.

Sep 30, 2026

Built the family intake form so it saved every answer and both photos, and it turned away a 12 MB photo before the upload started.

Sep 30, 2026

The only build of its test that opened in the light cream look the request asked for.

Sep 30, 2026

Added the new teacher question and put the change live. Its class assistant answered questions about the class but could not count the families.

Results by task

See every Claude result

Model facts

The token limits are the most the model accepts. Taskade can run it with lower limits.

Last updated
Input types
Text, Images, PDF
Output types
Text
Reasoning
Yes
Tool calling
Yes
File attachments
Yes
Structured output
Yes
Open weights
No
Reasoning effort
LowMediumHighExtra highMax

Published specs from the model maker, via models.dev (MIT).

Run Claude Opus 5.5 with your own key

Pick it with your own key in a custom agent.

Key providers for Claude Opus 5.5, and the plan each one needs
Key providerPlan
AnthropicPro and up

Where it runs

Services outside Taskade that serve Claude Opus 5.5, from models.dev. Each link opens in a new tab. In Taskade, your own key works only through the key providers on this page.

How to choose Claude Opus 5.5

  1. Open the agent settings.
  2. Under AI Model, choose the model.
  3. Under Bring Your Own Key, add or select your provider key.

Claude in the docs

Where Claude ranks

TSK Score out of 100.

  1. 1GPT88 out of 100
  2. 2Claude75 out of 100
  3. 2DeepSeek75 out of 100
  4. 2Kimi75 out of 100
  5. 2Grok75 out of 100
  6. 6GLM63 out of 100
  7. 7Qwen50 out of 100
  8. 8Gemini44 out of 100

Compare Claude

Claude vs ChatGPTDeepSeek vs ClaudeGemini vs ClaudeGLM vs ClaudeGPT-6.1 Sol vs Claude Opus 5.5GPT vs Claude

Other Anthropic models

Claude Haiku 4.5Claude Opus 5Claude Sonnet 5Claude Sonnet 5.5Claude Sonnet 4.5

FAQ

Which Taskade plans include Claude Opus 5.5?

Claude Opus 5.5 runs on Pro and up, with your own API key. Your provider bills the model use to your own account.

Has Taskade tested Claude Opus 5.5?

Yes. We last tested Claude Opus 5.5 on Sep 30, 2026 in the TSK-1 Benchmark. The newest Claude we test. On a family intake form it saved every answer and both photos, turned away an oversized photo before the upload, and was the only build of its test to open in the warm cream look the request asked for.

How do I choose Claude Opus 5.5 in Taskade?

Open the agent settings. Under AI Model, choose Claude Opus 5.5. Under Bring Your Own Key, select your provider key.

Can I use my own API key for Claude Opus 5.5?

Yes. In a custom agent, you can pick Claude Opus 5.5 with your own key from Anthropic (Pro and up). Your provider bills the model use to your own account.

Who makes Claude Opus 5.5?

Anthropic makes Claude Opus 5.5. Taskade runs it on Pro and up, with your own API key, beside frontier models from other top AI labs.