Gemma 4 31B (free) is free for input tokens while Claude Opus 4.5 costs $5 per 1M tokens.
API cost decision in 10 seconds
Gemma 4 31B (free) vs Claude Opus 4.5
Pick Gemma 4 31B (free) when budget and context both matter.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Gemma 4 31B (free) when budget and context both matter.
On the standard 1M input plus 500K output workload, Gemma 4 31B (free) is estimated at $0 vs $17.5 for Claude Opus 4.5, saving $17.5 (100% lower).
Cost-first pickGemma 4 31B (free)
Context-first pickGemma 4 31B (free)
Sample savings$17.5100%
10x traffic gap$175
Gemma 4 31B (free) is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $175. 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 | Gemma 4 31B (free) | Claude Opus 4.5 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Gemma 4 31B (free) | $0 | $37.5 |
| Balanced workload | 1M input + 1M output | Gemma 4 31B (free) | $0 | $30 |
| Output-heavy chatbot | 1M input + 5M output | Gemma 4 31B (free) | $0 | $130 |
Gemma 4 31B (free) is free for output tokens while Claude Opus 4.5 costs $25 per 1M tokens.
Gemma 4 31B (free) has 62.14K more context (1.31x larger).
Gemma 4 31B (free) is free for the standard workload while the other model is estimated at $17.5.
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
Gemma 4 31B (free) has the lower input price; Gemma 4 31B (free) has the lower output price; Gemma 4 31B (free) 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 $0 for Gemma 4 31B (free) and $17.5 for Claude Opus 4.5.
Choose Gemma 4 31B (free) when you care most about lower input-token price, lower output-token price, and larger context window.
Choose Claude Opus 4.5 when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
- On the standard 1M input plus 500K output workload, Gemma 4 31B (free) is estimated at $0 vs $17.5 for Claude Opus 4.5, saving $17.5 (100% lower).
- Gemma 4 31B (free) is free for the standard workload while the other model is estimated at $17.5.
- Gemma 4 31B (free) is free for input tokens while Claude Opus 4.5 costs $5 per 1M tokens.
- Gemma 4 31B (free) is free for output tokens while Claude Opus 4.5 costs $25 per 1M tokens.
- Gemma 4 31B (free) has 62.14K more context (1.31x larger).
| Feature | Gemma 4 31B (free) (Google) | Claude Opus 4.5 (Anthropic) |
|---|---|---|
| Input Price prompt tokens per 1M | $0 | $5 |
| Completion Price per 1M tokens | $0 | $25 |
| Sample Workload Cost 1M input + 500K output | $0 | $17.5 |
| Context Window | 262.14K | 200K |
| 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 $17.5 for Claude Opus 4.5, saving $17.5 (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 | Gemma 4 31B (free) | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Claude 3 Haiku can replace Claude Opus 4.5 when lower sample workload cost matters most: $0.88.
- Claude 3.5 Haiku can replace Claude Opus 4.5 when lower sample workload cost matters most: $2.8.
- Anthropic Claude Haiku Latest can replace Claude Opus 4.5 when lower sample workload cost matters most: $3.5.
- Claude Haiku 4.5 can replace Claude Opus 4.5 when lower sample workload cost matters most: $3.5.
- 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.
- OpenAI GPT Latest offers 1.05M context with $20 sample workload cost.
- No popular competitor is currently available.
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
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