Anthropic: Claude Opus 4.8
Claude Opus 4.8 from Anthropic is an advanced AI model capable of handling text, images, and files, with a context length of up to one million tokens. It supports reasoning and tools integration, allowing for more practical applications; however, structured output support is currently unavailable. This model should be considered by users requiring a robust blend of functionalities at a higher price point. With a benchmark blended score of 94.7 across four independent benchmarks, it offers strong performance, but its pricing of $5.0 per million input tokens and $25.0 per million output tokens may limit its appeal to cost-sensitive organizations.
Benchmark results
Independent, published benchmarks. Blended score 94.7 across 4 benchmarks, last refreshed 2026-08-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 94.6 |
| AI Index Coding | software engineering tasks | 100.0 |
| AI Index Agentic | multi-step tool-using tasks | 81.5 |
| EQ-Bench | emotional understanding in dialogue | 83.3 |
- Model ID
- anthropic/claude-opus-4.8
- Vendor
- anthropic
- Released
- May 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 $5.00/M input and $25.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.19 |
| Classify 1,000 customer emails | 500k in / 50k out | $3.75 |
| A month of a busy support chatbot | 5M in / 2M out | $75.00 |
Category rankings
Where Anthropic: Claude Opus 4.8 places across the 35 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #12 | Bug FixingCode · of 25 ranked | 188 |
| #12 | Scientific CodingResearch · of 25 ranked | 188 |
| #13 | Code ReviewCode · of 25 ranked | 174 |
| #13 | Code RefactoringCode · of 25 ranked | 171 |
| #13 | ETL ScriptingData · of 25 ranked | 159 |
| #13 | Creative WritingWriting · of 25 ranked | 164 |
| #13 | Screenwriting & DialogWriting · of 25 ranked | 164 |
| #13 | Academic WritingWriting · of 25 ranked | 164 |
| #13 | Legal DraftingProfessional · of 25 ranked | 164 |
| #13 | Legal ResearchProfessional · of 25 ranked | 176 |
| #13 | Contract ReviewProfessional · of 25 ranked | 186 |
| #13 | Medical Note SummarizationProfessional · of 25 ranked | 159 |
| #13 | Scientific ResearchProfessional · of 25 ranked | 176 |
| #13 | Physics TutoringEducation · of 25 ranked | 151 |
| #13 | History TutoringEducation · of 25 ranked | 149 |
| #13 | Essay GradingEducation · of 25 ranked | 174 |
| #13 | RFP ResponseBusiness · of 25 ranked | 181 |
| #13 | OKRs & Strategic PlanningBusiness · of 25 ranked | 164 |
| #13 | Agent WorkflowsAgents · of 25 ranked | 200 |
| #13 | RAG PipelinesAgents · of 25 ranked | 171 |
| #13 | Long-Context Q&AAgents · of 25 ranked | 161 |
| #13 | Coding AgentsAgents · of 25 ranked | 200 |
| #13 | Fiction CollaboratorPersonal · of 25 ranked | 176 |
| #13 | Math ProofsResearch · of 25 ranked | 164 |
| #13 | Literature ReviewResearch · of 25 ranked | 176 |
| #15 | Long-Document SummarizationWriting · of 25 ranked | 164 |
| #16 | Character RoleplayPersonal · of 25 ranked | 152 |
| #18 | Unit Test GenerationCode · of 25 ranked | 156 |
| #18 | CI/CD PipelinesCode · of 25 ranked | 146 |
| #20 | Data AnalysisData · of 25 ranked | 173 |
| #20 | Financial AnalysisProfessional · of 25 ranked | 161 |
| #20 | Math TutoringEducation · of 25 ranked | 149 |
| #20 | Meeting NotesBusiness · of 25 ranked | 151 |
| #20 | Experiment DesignResearch · of 25 ranked | 159 |
| #22 | Browser AutomationAgents · of 25 ranked | 172 |
Similar models
Claude Opus 5
Anthropic: Claude Fable 5 (batch)
Anthropic: Claude Opus 4.7
Anthropic: Claude Opus 4.6
Anthropic: Claude Opus 4.5
Anthropic: Claude 3 Haiku
Quick answers
- How much does Anthropic: Claude Opus 4.8 cost?
- $5.00 per million input tokens and $25.00 per million output tokens.
- What is Anthropic: Claude Opus 4.8's context window?
- 1,000,000 tokens, roughly 1,500 pages of text in a single request.
- Does Anthropic: Claude Opus 4.8 support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Anthropic: Claude Opus 4.8 process images?
- Yes, it accepts image input.