Compare / Mixtral 8x22B Instruct vs GPT-5.6 Luna
Mixtral 8x22B Instruct vs GPT-5.6 Luna
Which is cheaper, which is more capable, and which does better at each kind of work, from 12 results on 3 sources that measured both models.
Mixtral 8x22B Instruct or GPT-5.6 Luna? The short answer
- GPT-5.6 Luna is cheaper: $0.45 against $3.00 per million tokens, 6.7 times less.
- GPT-5.6 Luna scores higher on the Artificial Analysis Intelligence Index: 37.3 against 5.7.
- On our business benchmarks, GPT-5.6 Luna ranks higher for reasoning and knowledge and writing.
At a glance
| Mixtral 8x22B Instruct | GPT-5.6 Luna | |
|---|---|---|
| Price per million tokens | $2.00 in · $6.00 out | $0.20 in · $1.20 out |
| Blended (3 in : 1 out) | $3.00 | $0.45 |
| Cheapest host, blended | $3.00 (Mistral) | $0.23 (OpenAI) |
| Intelligence Index | 5.7 | 37.3 |
| Spring Prompt overall | – | – |
| Output speed, tokens a second | – | – |
| Context window | 65,536 tokens | 1,050,000 tokens |
| Weights | Open | Closed |
| Developer based in | France | the US |
Prices are the developer's list price where we have read it, otherwise the typical host on OpenRouter; see every model's price. Intelligence and speed from Artificial Analysis.
Which is better for what
Each model's rank among models available today, for each kind of work, from our own benchmarks and licensed sources. The better rank is in green.
| Use case | Mixtral 8x22B Instruct | GPT-5.6 Luna |
|---|---|---|
| Agents and tool useMulti-step tasks with tools: support desks, coding agents, function calls | not measured | 47 of 161 |
| Professional workReal tasks from banking, consulting and law, business documents and freelance projects | not measured | 20 of 51 |
| Reasoning and knowledgeHard questions across science, maths and general knowledge | 194 of 195 | 38 of 195 |
| WritingWhat people prefer in blind comparisons, and judged writing quality | 172 of 187 | 57 of 187 |
| Sticking to the factsSummarising without inventing things, and factual answers | not measured | 59 of 153 |
Every shared result
| Benchmark | Metric | Mixtral 8x22B Instruct | GPT-5.6 Luna |
|---|---|---|---|
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,211 | 1,463 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,191 | 1,412 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,218 | 1,491 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,215 | 1,446 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,230 | 1,454 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,210 | 1,435 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 5.70 | 37.3 |
| Artificial Analysisreported | GPQA Diamond% of questions | 33.2% | 91.1% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 4.0% | 39.5% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 21.0% | 15.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.35 | 0.38 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 27.4 | 53.7 |
Bold green marks the better value on that metric. Where a source reports ranges that overlap, the difference may not be meaningful; see the benchmark page for ranges.
Quick answers
Is Mixtral 8x22B Instruct better than GPT-5.6 Luna?
It depends on the task. Among models available today, on our benchmarks and licensed sources, GPT-5.6 Luna ranks higher for reasoning and knowledge and writing.
Which is cheaper, Mixtral 8x22B Instruct or GPT-5.6 Luna?
GPT-5.6 Luna costs $0.45 per million tokens (three input to one output), against $3.00 for Mixtral 8x22B Instruct.
Run Mixtral 8x22B Instruct and GPT-5.6 Luna on your own prompt
Benchmarks aren't your data. Try both side by side in the playground, with the cost of every answer.