Gemma 4 31B (free) is free for input tokens while GPT Chat Latest costs $5 per 1M tokens.
API cost decision in 10 seconds
NewGPT Chat Latest vs Gemma 4 31B (free)
Pick Gemma 4 31B (free) for lower cost; pick GPT Chat Latest only if the larger context window matters more.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Gemma 4 31B (free) for lower cost; pick GPT Chat Latest only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Gemma 4 31B (free) is estimated at $0 vs $20 for GPT Chat Latest, saving $20 (100% lower).
Cost-first pickGemma 4 31B (free)
Context-first pickGPT Chat Latest
Sample savings$20100%
10x traffic gap$200
GPT Chat Latest has more context, but Gemma 4 31B (free) saves $20 on the standard workload. At 10x that traffic, the same price gap is about $200. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Gemma 4 31B (free) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GPT Chat Latest | Gemma 4 31B (free) |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Gemma 4 31B (free) | $40 | $0 |
| Balanced workload | 1M input + 1M output | Gemma 4 31B (free) | $35 | $0 |
| Output-heavy chatbot | 1M input + 5M output | Gemma 4 31B (free) | $155 | $0 |
Gemma 4 31B (free) is free for output tokens while GPT Chat Latest costs $30 per 1M tokens.
GPT Chat Latest has 137.86K more context (1.53x larger).
Gemma 4 31B (free) is free for the standard workload while the other model is estimated at $20.
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
Gemma 4 31B (free) has the lower input price; Gemma 4 31B (free) has the lower output price; GPT Chat Latest offers the larger context window. For the 1M input plus 500K output sample, Gemma 4 31B (free) is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $20 for GPT Chat Latest and $0 for Gemma 4 31B (free).
Choose GPT Chat Latest when you care most about larger context window.
Choose Gemma 4 31B (free) when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, Gemma 4 31B (free) is estimated at $0 vs $20 for GPT Chat Latest, saving $20 (100% lower).
- Gemma 4 31B (free) is free for the standard workload while the other model is estimated at $20.
- Gemma 4 31B (free) is free for input tokens while GPT Chat Latest costs $5 per 1M tokens.
- Gemma 4 31B (free) is free for output tokens while GPT Chat Latest costs $30 per 1M tokens.
- GPT Chat Latest has 137.86K more context (1.53x larger).
| Feature | NewGPT Chat Latest (OpenAI) | Gemma 4 31B (free) (Google) |
|---|---|---|
| Input Price prompt tokens per 1M | $5 | $0 |
| Completion Price per 1M tokens | $30 | $0 |
| Sample Workload Cost 1M input + 500K output | $20 | $0 |
| Context Window | 400K | 262.14K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Gemma 4 31B (free) | On the standard 1M input plus 500K output workload, Gemma 4 31B (free) is estimated at $0 vs $20 for GPT Chat Latest, saving $20 (100% lower). |
| High-volume input processing | Gemma 4 31B (free) | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Gemma 4 31B (free) | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT Chat Latest | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace GPT Chat Latest when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT Chat Latest when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT Chat Latest when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace GPT Chat Latest when lower sample workload cost matters most: $0.13.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- GPT-5.5 offers 1.05M context with $20 sample workload cost.
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