Anthropic: Claude Sonnet 5 vs OpenAI: GPT-5.4
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| Anthropic: Claude Sonnet 5 | OpenAI: GPT-5.4 | |
|---|---|---|
| Vendor | anthropic | openai |
| Quality Score | 100 | 100 |
| Benchmark Score | 91.4 | 89.6 |
| Input Price | $2.00/M | $2.50/M |
| Output Price | $10.00/M | $15.00/M |
| Context Window | 1,000,000 | 1,050,000 |
| Max Output | 128,000 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 88.0 | 84.8 |
| ai_index_agentic | 77.0 | 67.8 |
| ai_index_coding | 100.0 | 100.0 |
| eqbench | - | 75.6 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Claude Sonnet 5 costs $4.50 and GPT-5.4 costs $6.25, so Claude Sonnet 5 is about 1.4 times cheaper for the same work.
Both take in a similar amount of text: 1,000,000 and 1,050,000 tokens, about 1,500 and 1,575 pages.
On our blended benchmark score Claude Sonnet 5 leads 91.4 to 89.6.
Across the 19 tasks where they differ, Claude Sonnet 5 scores higher on 2 (JSON Extraction, Bulk Data Labeling), GPT-5.4 on 17 (SQL Generation, Code Review, Code Completion and others).
Claude Sonnet 5 was released in June 2026 and GPT-5.4 in March 2026.
Pick Claude Sonnet 5 if you need lower cost or benchmark performance; pick GPT-5.4 if you need the stronger all-round task scores.
Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.
Who wins by task?
| Task | Anthropic: Claude Sonnet 5 | OpenAI: GPT-5.4 |
|---|---|---|
| SQL Generation | 171 | 174 |
| Code Review | 167 | 175 |
| Code Completion | 119 | 120 |
| Code Refactoring | 164 | 173 |
| Bug Fixing | 180 | 187 |
| Unit Test Generation | 154 | 158 |
| Code Documentation | 141 | 146 |
| Regex Writing | 135 | 136 |
| CI/CD Pipelines | 144 | 149 |
| Frontend Component Design | 146 | 148 |
| Data Analysis | 171 | 173 |
| CSV / Spreadsheet Cleanup | 153 | 157 |
| ETL Scripting | 154 | 161 |
| JSON Extraction | 138 | 137 |
| Bulk Data Labeling | 124 | 122 |
| OCR / Document Parsing | 146 | 148 |
| Table Extraction from PDFs | 146 | 148 |
| Long-Document Summarization | 159 | 167 |
| Blog Post Writing | 140 | 143 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →