Inkling Small (free) is free for input tokens while GPT-5.4 Image 2 costs $8 per 1M tokens.
API cost decision in 10 seconds
Inkling Small (free) vs GPT-5.4 Image 2
Pick Inkling Small (free) for lower cost; pick GPT-5.4 Image 2 only if the larger context window matters more.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Inkling Small (free) for lower cost; pick GPT-5.4 Image 2 only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Inkling Small (free) is estimated at $0 vs $15.5 for GPT-5.4 Image 2, saving $15.5 (100% lower).
Cost-first pickInkling Small (free)
Context-first pickGPT-5.4 Image 2
Sample savings$15.5100%
10x traffic gap$155
GPT-5.4 Image 2 has more context, but Inkling Small (free) saves $15.5 on the standard workload. At 10x that traffic, the same price gap is about $155. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Inkling Small (free) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Inkling Small (free) | GPT-5.4 Image 2 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Inkling Small (free) | $0 | $47.5 |
| Balanced workload | 1M input + 1M output | Inkling Small (free) | $0 | $23 |
| Output-heavy chatbot | 1M input + 5M output | Inkling Small (free) | $0 | $83 |
Inkling Small (free) is free for output tokens while GPT-5.4 Image 2 costs $15 per 1M tokens.
GPT-5.4 Image 2 has 9.86K more context (1.04x larger).
Inkling Small (free) is free for the standard workload while the other model is estimated at $15.5.
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Inkling Small (free) has the lower input price; Inkling Small (free) has the lower output price; GPT-5.4 Image 2 offers the larger context window. For the 1M input plus 500K output sample, Inkling Small (free) is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0 for Inkling Small (free) and $15.5 for GPT-5.4 Image 2.
Choose Inkling Small (free) when you care most about lower input-token price, and lower output-token price.
Choose GPT-5.4 Image 2 when you care most about larger context window.
- On the standard 1M input plus 500K output workload, Inkling Small (free) is estimated at $0 vs $15.5 for GPT-5.4 Image 2, saving $15.5 (100% lower).
- Inkling Small (free) is free for the standard workload while the other model is estimated at $15.5.
- Inkling Small (free) is free for input tokens while GPT-5.4 Image 2 costs $8 per 1M tokens.
- Inkling Small (free) is free for output tokens while GPT-5.4 Image 2 costs $15 per 1M tokens.
- GPT-5.4 Image 2 has 9.86K more context (1.04x larger).
| Feature | Inkling Small (free) (Thinking Machines) | GPT-5.4 Image 2 (OpenAI) |
|---|---|---|
| Input Price prompt tokens per 1M | $0 | $8 |
| Completion Price per 1M tokens | $0 | $15 |
| Sample Workload Cost 1M input + 500K output | $0 | $15.5 |
| Context Window | 262.14K | 272K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Inkling Small (free) | On the standard 1M input plus 500K output workload, Inkling Small (free) is estimated at $0 vs $15.5 for GPT-5.4 Image 2, saving $15.5 (100% lower). |
| High-volume input processing | Inkling Small (free) | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Inkling Small (free) | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT-5.4 Image 2 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace GPT-5.4 Image 2 when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT-5.4 Image 2 when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT-5.4 Image 2 when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace GPT-5.4 Image 2 when lower sample workload cost matters most: $0.12.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.17 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.
- DeepSeek V4 Flash 0731 · DeepSeek · #1
- MiMo-V2.5 · Xiaomi · #2
- Hy3 · Tencent · #3
- Ox Alpha · stealth · #4
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
Find models with larger context windows for RAG, long documents, and codebase review.
Open largest context modelsProvider catalogs
Compare models within provider hubs before choosing a final API vendor.
Open provider hubsThinking Machines catalog
Review all tracked Thinking Machines models before deciding whether this matchup is the right shortlist.
Open Thinking Machines modelsOpenAI catalog
Check other OpenAI models with comparable pricing, context, or release timing.
Open OpenAI modelsInkling Small is an open-weight multimodal mixture-of-experts model from Thinking Machines Lab, with 12B active parameters out of 276B total. It is positioned as the smaller, more efficient member of...
[GPT-5.4](https://openrouter.ai/openai/gpt-5.4) Image 2 combines OpenAI's GPT-5.4 model with state-of-the-art image generation capabilities from GPT Image 2. It enables rich multimodal workflows, allowing users to seamlessly move between reasoning, coding, and...