head-to-head
OpenAI: GPT-5.6 Terra vs SpaceXAI: Grok 4.3
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.
| OpenAI: GPT-5.6 Terra | SpaceXAI: Grok 4.3 | |
|---|---|---|
| Vendor | openai | x-ai |
| Quality Score | 100 | 100 |
| Benchmark Score | 71.1 | 39.3 |
| Input Price | $2.00/M | $1.25/M |
| Output Price | $12.00/M | $2.50/M |
| Context Window | 1,050,000 | 1,000,000 |
| Max Output | 128,000 | 900,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 69.4 | 41.1 |
Who wins by task?
| Task | OpenAI: GPT-5.6 Terra | SpaceXAI: Grok 4.3 |
|---|---|---|
| SQL Generation | 140 | 138 |
| Code Review | 145 | 139 |
| Code Completion | 118 | 120 |
| Code Refactoring | 147 | 142 |
| Bug Fixing | 149 | 143 |
| Unit Test Generation | 132 | 128 |
| Code Documentation | 135 | 134 |
| Regex Writing | 124 | 123 |
| CI/CD Pipelines | 128 | 124 |
| Frontend Component Design | 130 | 126 |
| Data Analysis | 134 | 130 |
| CSV / Spreadsheet Cleanup | 135 | 135 |
| ETL Scripting | 137 | 133 |
| JSON Extraction | 121 | 123 |
| Bulk Data Labeling | 117 | 120 |
| OCR / Document Parsing | 134 | 133 |
| Table Extraction from PDFs | 134 | 133 |
| Long-Document Summarization | 147 | 144 |
| Short-Form Summarization | 116 | 117 |
| Blog Post Writing | 128 | 126 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
Related comparisons
Anthropic: Claude Opus 5 (batch) vs OpenAI: GPT-5.6 Terra
Anthropic: Claude Opus 5 (batch) vs SpaceXAI: Grok 4.3
Anthropic: Claude Sonnet 5 (batch) vs SpaceXAI: Grok 4.3
Anthropic: Claude Sonnet 5 vs SpaceXAI: Grok 4.3
ByteDance Seed: Seed-2.0-Code vs OpenAI: GPT-5.6 Terra
ByteDance Seed: Seed 2.1 Turbo vs OpenAI: GPT-5.6 Terra
DeepSeek: DeepSeek V4 Flash Vision Exp vs OpenAI: GPT-5.6 Terra
Google: Gemini 3.1 Flash Lite vs SpaceXAI: Grok 4.3