API cost decision in 10 seconds

NewAnthropic Claude Haiku Latest vs Gemini 3.1 Pro Preview Custom Tools

Pick Anthropic Claude Haiku Latest for lower cost; pick Gemini 3.1 Pro Preview Custom Tools only if the larger context window matters more.

Pricing data updated: 2026-05-26T11:08:00Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Anthropic Claude Haiku Latest for lower cost; pick Gemini 3.1 Pro Preview Custom Tools only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Anthropic Claude Haiku Latest is estimated at $3.5 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $4.5 (56.2% lower).

Cost-first pickAnthropic Claude Haiku Latest

Context-first pickGemini 3.1 Pro Preview Custom Tools

Sample savings$4.556.2%

10x traffic gap$45

Gemini 3.1 Pro Preview Custom Tools has more context, but Anthropic Claude Haiku Latest saves $4.5 on the standard workload. At 10x that traffic, the same price gap is about $45. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Anthropic Claude Haiku Latest stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Anthropic Claude Haiku Latest	Gemini 3.1 Pro Preview Custom Tools
Input-heavy / RAG	5M input + 500K output	Anthropic Claude Haiku Latest	$7.5	$16
Balanced workload	1M input + 1M output	Anthropic Claude Haiku Latest	$6	$14
Output-heavy chatbot	1M input + 5M output	Anthropic Claude Haiku Latest	$26	$62

Cheaper input Anthropic Claude Haiku Latest $1 vs $2 / 1M

Anthropic Claude Haiku Latest is $1 cheaper per 1M input tokens (50% lower; 2x difference).

Cheaper output Anthropic Claude Haiku Latest $5 vs $12 / 1M

Anthropic Claude Haiku Latest is $7 cheaper per 1M output tokens (58.3% lower; 2.4x difference).

Larger context Gemini 3.1 Pro Preview Custom Tools 200K vs 1.05M

Gemini 3.1 Pro Preview Custom Tools has 848.76K more context (5.24x larger).

Sample workload Anthropic Claude Haiku Latest $3.5 vs $8

Anthropic Claude Haiku Latest is $4.5 cheaper on the standard workload (56.2% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Anthropic Claude Haiku Latest Calculating… Estimated API cost

Gemini 3.1 Pro Preview Custom Tools Calculating… Estimated API cost

Cheaper for this workload Calculating… Difference: calculating…

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

Verdict

Anthropic Claude Haiku Latest has the lower input price; Anthropic Claude Haiku Latest has the lower output price; Gemini 3.1 Pro Preview Custom Tools offers the larger context window. For the 1M input plus 500K output sample, Anthropic Claude Haiku Latest is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $3.5 for Anthropic Claude Haiku Latest and $8 for Gemini 3.1 Pro Preview Custom Tools.

Best Fit

Choose Anthropic Claude Haiku Latest when you care most about lower input-token price, and lower output-token price.

Choose Gemini 3.1 Pro Preview Custom Tools when you care most about larger context window.

Decision Notes

On the standard 1M input plus 500K output workload, Anthropic Claude Haiku Latest is estimated at $3.5 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $4.5 (56.2% lower).
Anthropic Claude Haiku Latest is $4.5 cheaper on the standard workload (56.2% lower).
Anthropic Claude Haiku Latest is $1 cheaper per 1M input tokens (50% lower; 2x difference).
Anthropic Claude Haiku Latest is $7 cheaper per 1M output tokens (58.3% lower; 2.4x difference).
Gemini 3.1 Pro Preview Custom Tools has 848.76K more context (5.24x larger).

Head-to-Head Specs

Feature	NewAnthropic Claude Haiku Latest (Anthropic)	Gemini 3.1 Pro Preview Custom Tools (Google)
Input Price prompt tokens per 1M	$1	$2
Completion Price per 1M tokens	$5	$12
Sample Workload Cost 1M input + 500K output	$3.5	$8
Context Window	200K	1.05M
Release Date	2026-04-27	2026-02-25

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Anthropic Claude Haiku Latest	On the standard 1M input plus 500K output workload, Anthropic Claude Haiku Latest is estimated at $3.5 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $4.5 (56.2% lower).
High-volume input processing	Anthropic Claude Haiku Latest	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Anthropic Claude Haiku Latest	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Gemini 3.1 Pro Preview Custom Tools	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Claude 3 Haiku can replace Anthropic Claude Haiku Latest when lower sample workload cost matters most: $0.88.
Claude 3.5 Haiku can replace Anthropic Claude Haiku Latest when lower sample workload cost matters most: $2.8.
Gemma 4 26B A4B (free) can replace Gemini 3.1 Pro Preview Custom Tools when lower sample workload cost matters most: $0.
Gemma 4 31B (free) can replace Gemini 3.1 Pro Preview Custom Tools when lower sample workload cost matters most: $0.

Larger context near this budget

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-5.4 offers 1.05M context with $10 sample workload cost.

Popular competitors

No popular competitor is currently available.

Cheaper alternatives

Review low-cost models sorted by a standard 1M input plus 500K output workload.

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Larger context alternatives

Find models with larger context windows for RAG, long documents, and codebase review.

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Provider catalogs

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Anthropic catalog

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Google catalog

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Anthropic Claude Haiku Latest

This model always redirects to the latest model in the Anthropic Claude Haiku family.

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