MoonshotAI: Kimi K2.6 vs OpenAI: GPT-5.4
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| MoonshotAI: Kimi K2.6 | OpenAI: GPT-5.4 | |
|---|---|---|
| Vendor | moonshotai | openai |
| Quality Score | 100 | 100 |
| Benchmark Score | 76.7 | 89.6 |
| Input Price | $0.65/M | $2.50/M |
| Output Price | $3.41/M | $15.00/M |
| Context Window | 262,144 | 1,050,000 |
| Max Output | 235,929 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 73.0 | 84.8 |
| ai_index_agentic | 49.9 | 67.8 |
| ai_index_coding | 100.0 | 100.0 |
| eqbench | 63.5 | 75.6 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Kimi K2.6 costs $1.50 and GPT-5.4 costs $6.25, so Kimi K2.6 is about 4.2 times cheaper for the same work.
GPT-5.4 reads up to 1,050,000 tokens at once, roughly 1,575 pages of text, against about 393 pages for Kimi K2.6.
On our blended benchmark score GPT-5.4 leads 89.6 to 76.7.
Across the 20 tasks where they differ, Kimi K2.6 scores higher on 4 (Code Completion, JSON Extraction, Bulk Data Labeling and others), GPT-5.4 on 16 (SQL Generation, Code Review, Code Refactoring and others).
Kimi K2.6 was released in April 2026 and GPT-5.4 in March 2026.
Pick Kimi K2.6 if you need lower cost; pick GPT-5.4 if you need long documents, benchmark performance or 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 | MoonshotAI: Kimi K2.6 | OpenAI: GPT-5.4 |
|---|---|---|
| SQL Generation | 168 | 174 |
| Code Review | 164 | 175 |
| Code Completion | 131 | 120 |
| Code Refactoring | 160 | 173 |
| Bug Fixing | 174 | 187 |
| Unit Test Generation | 152 | 158 |
| Code Documentation | 140 | 146 |
| Regex Writing | 136 | 136 |
| CI/CD Pipelines | 142 | 149 |
| Frontend Component Design | 145 | 148 |
| Data Analysis | 166 | 173 |
| CSV / Spreadsheet Cleanup | 151 | 157 |
| ETL Scripting | 151 | 161 |
| JSON Extraction | 147 | 137 |
| Bulk Data Labeling | 134 | 122 |
| OCR / Document Parsing | 144 | 148 |
| Table Extraction from PDFs | 144 | 148 |
| Long-Document Summarization | 156 | 167 |
| Short-Form Summarization | 131 | 122 |
| Blog Post Writing | 139 | 143 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →