Compare / GPT-5.1 vs Inkling
GPT-5.1 vs Inkling
Which is cheaper, which is more capable, and which does better at each kind of work, from 15 results on 3 sources that measured both models.
GPT-5.1 or Inkling? The short answer
- Inkling is cheaper: $1.72 against $3.44 per million tokens, 50% less.
- They score about the same on the Artificial Analysis Intelligence Index (24.7 and 25.0).
- On our business benchmarks, GPT-5.1 ranks higher for writing and sticking to the facts.
- On our business benchmarks, Inkling ranks higher for agents and tool use and reasoning and knowledge.
At a glance
| GPT-5.1 | Inkling | |
|---|---|---|
| Price per million tokens | $1.25 in · $10.00 out | $0.95 in · $4.05 out |
| Blended (3 in : 1 out) | $3.44 | $1.72 |
| Cheapest host, blended | $1.72 (OpenAI) | $1.72 (DeepInfra, FP8) |
| Intelligence Index | 24.7 | 25.0 |
| Spring Prompt overall | – | – |
| Output speed, tokens a second | – | 166 |
| Context window | 400,000 tokens | 524,288 tokens |
| Weights | Closed | Open |
| Developer based in | the US | 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 | GPT-5.1 | Inkling |
|---|---|---|
| Agents and tool useMulti-step tasks with tools: support desks, coding agents, function calls | 82 of 161 | 56 of 161 |
| Professional workReal tasks from banking, consulting and law, business documents and freelance projects | not measured | 45 of 51 |
| Reasoning and knowledgeHard questions across science, maths and general knowledge | 66 of 195 | 64 of 195 |
| WritingWhat people prefer in blind comparisons, and judged writing quality | 52 of 187 | 59 of 187 |
| Sticking to the factsSummarising without inventing things, and factual answers | 62 of 153 | 75 of 153 |
Every shared result
| Benchmark | Metric | GPT-5.1 | Inkling |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,459 | 1,452 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,448 | 1,444 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,428 | 1,384 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,482 | 1,474 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,450 | 1,427 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,456 | 1,442 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,437 | 1,403 |
| Artificial Analysisreported | Artificial Analysis Coding Indexindex score | 49.4 | 52.1 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 24.7 | 25.0 |
| Artificial Analysisreported | GPQA Diamond% of questions | 87.3% | 87.2% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 28.5% | 31.9% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 80.0% | 77.3% |
| Artificial Analysisreported | Terminal-Bench 2.1% of tasks | 52.4% | 55.1% |
| Artificial Analysisreported | Τ-bench banking% of tasks | 15.9% | 29.1% |
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 48.0% | 40.3% |
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 GPT-5.1 better than Inkling?
It depends on the task. Among models available today, on our benchmarks and licensed sources, GPT-5.1 ranks higher for writing and sticking to the facts; Inkling ranks higher for agents and tool use and reasoning and knowledge.
Which is cheaper, GPT-5.1 or Inkling?
Inkling costs $1.72 per million tokens (three input to one output), against $3.44 for GPT-5.1.
Run GPT-5.1 and Inkling on your own prompt
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