LLM Comparison
Claude Opus 5 vs Claude Sonnet 5
Side-by-side specs, pricing & capabilities · Updated September 2026
Price vs Intelligence
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2/6 models| Organization | ||
| OpenTools Score | 92 6.1 | 63 10.4 |
| Family | Claude Opus | Claude Sonnet |
| Status | Current | Current |
| Release Date | Jul 2026 | Jun 2026 |
| Context Window | 1.0M tokens | 1.0M tokens |
| Input Price | $5.00/M tokens | $2.00/M tokens |
| Output Price | $25.00/M tokens | $10.00/M tokens |
| Pricing Notes | Claude Opus 5 is priced at $5 per million input tokens and $25 per million output tokens; fast mode is priced separately at Fable-level rates. | Claude API standard pricing is $2 input and $10 output per million tokens. Cache reads are $0.20, 5-minute cache writes $2.50, and 1-hour cache writes $4 per million tokens. Batch API input/output receives a 50% discount. Current official documentation lists these rates without the previously recorded August 31 introductory expiry; provider-specific rates may differ. |
| Capabilities | textvisionreasoningcodingtool-useagentslong-context | textvisionreasoningcodingtool-useextended-thinkingagents |
| Max Output | 128K tokens | 128K tokens |
| API Identifier | claude-opus-5 | claude-sonnet-5 |
| Benchmarks | ||
| Artificial Analysis Intelligence Index | 61artificial-analysis | 53artificial-analysis |
| Artificial Analysis Intelligence Index v4.1.1 | 63artificial-analysis | — |
| Artificial Analysis Intelligence Index v4.3 | 51https://artificialanalysis.ai/models/claude-opus-5 | 38https://artificialanalysis.ai/models/claude-sonnet-5 |
| GPQA Diamond | 93.2323artificial-analysis | 91.1111artificial-analysis |
| SciCode | 56.3657artificial-analysis | 54.2824artificial-analysis |
| Terminal-Bench 2.1 | 89.1386artificial-analysis | 80.5243artificial-analysis |
| View Claude Opus 5 | View Claude Sonnet 5 | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Claude Sonnet 5Cheapest | $2.00 | $5.00 | $7.00 | — |
| Claude Opus 5 | $5.00 | $12.50 | $17.50 | +150% |
Anthropic
Claude Opus 5
Claude Opus 5 is Anthropic's Opus-class model for complex agentic coding and enterprise work. Official Claude docs list the claude-opus-5 API ID, 1M token context window, 128k max output, adaptive thinking, and $5 input / $25 output pricing per million tokens.
Anthropic
Claude Sonnet 5
Claude Sonnet 5 is Anthropic next-generation Sonnet model and a drop-in upgrade from Sonnet 4.6. Anthropic docs state that adaptive thinking is on by default, manual extended thinking is removed, sampling parameter overrides return errors, and the model supports a 1M token context window with 128K max output.
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