Cheaper alternatives to Gemini 4 Argon
Gemini 4 Argon costs $2 / $10 per 1M input / output tokens and scores 166 on Epoch AI’s Capabilities Index. 2 current models score within its margin of error for less, the cheapest being Claude Haiku 5.5 at 95% less. Prices checked 13 Oct – 6 Nov 2026.
Similar capability, lower price
Highest score first
| Model | Capability | Input / output per 1M | Cheaper by | Customer chat assistant, a month | Compare |
|---|---|---|---|---|---|
 GPT-6.1 TerraOpenAI |
168level, within the margin | $1.00 / $5.00 | 50% | $153 | Compare |
 Claude Haiku 5.5Anthropic |
160level, within the margin | $0.10 / $0.50 | 95% | $15.50 | Compare |
A step down, for much less
Highest score first
| Model | Capability | Input / output per 1M | Cheaper by | Customer chat assistant, a month | Compare |
|---|---|---|---|---|---|
 Gemini 3.8 FlashGoogle |
1588 below | $0.75 / $3.75 | 63% | $116 | Compare |
 Qwen3.8 MaxAlibaba |
1588 below | $2.00 / $6.00 | 25% | $320 | Compare |
| GPT-6 LunaOpenAI |
1579 below | $0.10 / $0.50 | 95% | $15.50 | Compare |
 Muse Spark 1.3Meta |
1579 below | $1.25 / $4.25 | 50% | $155 | Compare |
 DeepSeek V4.1 FlashDeepSeek |
15610 below | $0.30 / $1.20 | 87% | $39.30 | Compare |
 GLM-5.3Z.ai |
15610 below | $1.40 / $4.40 | 46% | $171 | Compare |
 Grok 4.7xAI |
15511 below | $2.00 / $6.00 | 25% | $245 | Compare |
What switching saves on three workloads
Per month, list prices
| Workload | Gemini 4 Argon | Claude Haiku 5.5 | Gemini 3.8 Flash |
|---|---|---|---|
| Customer chat assistant100M in, 20M out, 50% cached | $305 | $15.50 | $116 |
| Document Q&A (RAG)240M in, 12M out, 30% cached | $463 | $23.52 | $176 |
| Coding agent750M in, 8M out, 85% cached | $369 | $21.63 | $162 |
Monthly cost at list prices with no batch discount. Your own numbers: open these models in the cost calculator.
How to choose
- Same quality, smaller bill: Claude Haiku 5.5 scores level with Gemini 4 Argon and costs 95% less. Test it on your hardest prompts first.
- Stay with Google: Gemini 3.8 Flash keeps the same API, tools and data terms at $0.75 / $3.75.
- Mix models: send routine requests to a cheaper model and keep Gemini 4 Argon for the hard ones. How much that saves depends on your traffic, so measure quality on a sample before switching everything.
- Cut the bill without switching: batch processing and prompt caching often save more than changing model. See how to cut your API bill in half.
Questions
What is the cheapest alternative to Gemini 4 Argon with similar capability?
Claude Haiku 5.5 from Anthropic, at $0.10 / $0.50 per 1M input / output tokens, 95% less than Gemini 4 Argon at a typical 3:1 mix. On Epoch AI’s Capabilities Index it scores 160 against 166, within the margin of error.
Is GPT-6.1 Terra as good as Gemini 4 Argon?
On general benchmarks, they’re level: Epoch AI’s Capabilities Index gives GPT-6.1 Terra 168 (range 165–173) and Gemini 4 Argon 166 (163–170). Benchmarks don’t cover every task, so run both on a sample of your own work before switching.
How much would I save by switching from Gemini 4 Argon?
For a customer chat assistant (100M input and 20M output tokens a month, half the input cached), Gemini 4 Argon costs $305 a month. Claude Haiku 5.5 costs $15.50, Gemini 3.8 Flash $116.
Is there a cheaper Google model than Gemini 4 Argon?
Yes: Gemini 3.8 Flash ($0.75 / $3.75, capability 158), Gemini 3.5 Flash-Lite ($0.30 / $2.50, capability 145). Staying with Google keeps your prompts, tools and billing the same.
Why isn’t every cheaper model listed?
We list current models that cost less than Gemini 4 Argon at a 3:1 input-to-output mix and either score within about 12 points of it on Epoch AI’s index or are in the same tier without a score yet. Much weaker models are cheaper still but rarely a like-for-like swap.
Capability: Epoch Capabilities Index by Epoch AI, CC BY 4.0, read 4 Nov 2026. Prices from each provider’s own page, linked on every model page.