anthropic
Anthropic: Claude Sonnet 5.5
The Anthropic: Claude Sonnet 5.5 is a model that can handle text, image, and file inputs, with a maximum context length of one million tokens. It supports tools and reasoning capabilities, but does not provide structured output. The model allows users to input files in addition to text and images. Considering its price point of $2/M input and $10/M output tokens, this model may be worth shortlisting for those who require robust reasoning capabilities and the ability to handle file inputs. Its benchmark blended score of 97 across one independent benchmark suggests competitive performance, but further evaluation is needed to confirm its standing.
Quality Score
100/100
price + capability + benchmarks
Input Price
$2.00
per 1M tokens · checked 2026-09-29
Output Price
$10.00
per 1M tokens · checked 2026-09-29
Context Window
1,000,000
tokens
Benchmark results
Independent, published benchmarks. Blended score 97.0 across 1 benchmark, last refreshed 2026-09-29. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 92.4 |
- Model ID
- anthropic/claude-sonnet-5.5
- Vendor
- anthropic
- Released
- September 2026
- Tokenizer
- Claude
- Input Modalities
- text, image, file
- Output Modalities
- text
- Max Output
- 128,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
What it costs in practice
Computed from the current $2.00/M input and $10.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.07 |
| Classify 1,000 customer emails | 500k in / 50k out | $1.50 |
| A month of a busy support chatbot | 5M in / 2M out | $30.00 |
Category rankings
Where Anthropic: Claude Sonnet 5.5 places across the 47 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #9 | Screenshot DebuggingVision · of 25 ranked | 135 |
| #13 | Frontend Component DesignCode · of 25 ranked | 133 |
| #13 | Chart & Graph ReadingVision · of 25 ranked | 139 |
| #15 | Marketing CopyWriting · of 25 ranked | 122 |
| #15 | Standardized Test PrepEducation · of 25 ranked | 122 |
| #16 | Diagram ExtractionVision · of 25 ranked | 134 |
| #17 | Physics TutoringEducation · of 25 ranked | 135 |
| #17 | Resume WritingBusiness · of 25 ranked | 113 |
| #17 | Browser AutomationAgents · of 25 ranked | 141 |
| #18 | Regex WritingCode · of 25 ranked | 126 |
| #18 | Language TranslationWriting · of 25 ranked | 126 |
| #18 | Math TutoringEducation · of 25 ranked | 129 |
| #18 | Fitness CoachingPersonal · of 25 ranked | 121 |
| #18 | Tutoring for KidsPersonal · of 25 ranked | 126 |
| #20 | Financial AnalysisProfessional · of 25 ranked | 133 |
| #20 | Experiment DesignResearch · of 25 ranked | 133 |
| #21 | CI/CD PipelinesCode · of 25 ranked | 131 |
| #21 | Data AnalysisData · of 25 ranked | 137 |
| #21 | Blog Post WritingWriting · of 25 ranked | 131 |
| #21 | Trip PlanningPersonal · of 25 ranked | 131 |
| #22 | Creative WritingWriting · of 25 ranked | 145 |
| #22 | Screenwriting & DialogWriting · of 25 ranked | 145 |
| #22 | Academic WritingWriting · of 25 ranked | 145 |
| #22 | Legal DraftingProfessional · of 25 ranked | 145 |
| #22 | OKRs & Strategic PlanningBusiness · of 25 ranked | 145 |
| #22 | Math ProofsResearch · of 25 ranked | 145 |
| #23 | Code RefactoringCode · of 25 ranked | 150 |
| #23 | Unit Test GenerationCode · of 25 ranked | 135 |
| #23 | Legal ResearchProfessional · of 25 ranked | 155 |
| #23 | Scientific ResearchProfessional · of 25 ranked | 155 |
| #23 | History TutoringEducation · of 25 ranked | 136 |
| #23 | RAG PipelinesAgents · of 25 ranked | 150 |
| #23 | Long-Context Q&AAgents · of 25 ranked | 146 |
| #23 | Character RoleplayPersonal · of 25 ranked | 141 |
| #23 | Fiction CollaboratorPersonal · of 25 ranked | 155 |
| #23 | Literature ReviewResearch · of 25 ranked | 155 |
| #24 | Code ReviewCode · of 25 ranked | 149 |
| #24 | Bug FixingCode · of 25 ranked | 153 |
| #24 | Long-Document SummarizationWriting · of 25 ranked | 151 |
| #24 | Essay GradingEducation · of 25 ranked | 149 |
| #24 | SOP / Process DocsBusiness · of 25 ranked | 121 |
| #24 | Scientific CodingResearch · of 25 ranked | 153 |
| #25 | SQL GenerationCode · of 25 ranked | 143 |
| #25 | ETL ScriptingData · of 25 ranked | 140 |
| #25 | Contract ReviewProfessional · of 25 ranked | 159 |
| #25 | Medical Note SummarizationProfessional · of 25 ranked | 140 |
| #25 | RFP ResponseBusiness · of 25 ranked | 154 |
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Quick answers
- How much does Anthropic: Claude Sonnet 5.5 cost?
- $2.00 per million input tokens and $10.00 per million output tokens.
- What is Anthropic: Claude Sonnet 5.5's context window?
- 1,000,000 tokens, roughly 1,500 pages of text in a single request.
- Does Anthropic: Claude Sonnet 5.5 support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Anthropic: Claude Sonnet 5.5 process images?
- Yes, it accepts image input.