API cost decision in 10 seconds

Qianfan-OCR-Fast vs Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Pick Nano Banana 2 (Gemini 3.1 Flash Image Preview) when budget and context both matter.

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

Budget verdict

Pick Nano Banana 2 (Gemini 3.1 Flash Image Preview) when budget and context both matter.

On the standard 1M input plus 500K output workload, Nano Banana 2 (Gemini 3.1 Flash Image Preview) is estimated at $2 vs $2.08 for Qianfan-OCR-Fast, saving $0.08 (4.1% lower).

Cost-first pickNano Banana 2 (Gemini 3.1 Flash Image Preview)

Context-first pickNano Banana 2 (Gemini 3.1 Flash Image Preview)

Sample savings$0.084.1%

10x traffic gap$0.85

Nano Banana 2 (Gemini 3.1 Flash Image Preview) is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $0.85. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Cost winner changes by workload shape: input-heavy / RAG favors Nano Banana 2 (Gemini 3.1 Flash Image Preview), balanced workload favors Qianfan-OCR-Fast, and output-heavy chatbot favors Qianfan-OCR-Fast.

Workload shape	Token mix	Better pick	Qianfan-OCR-Fast	Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Input-heavy / RAG	5M input + 500K output	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	$4.81	$4
Balanced workload	1M input + 1M output	Qianfan-OCR-Fast	$3.49	$3.5
Output-heavy chatbot	1M input + 5M output	Qianfan-OCR-Fast	$14.73	$15.5

Cheaper input Nano Banana 2 (Gemini 3.1 Flash Image Preview) $0.68 vs $0.5 / 1M

Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.18 cheaper per 1M input tokens (26.5% lower; 1.36x difference).

Cheaper output Qianfan-OCR-Fast $2.81 vs $3 / 1M

Qianfan-OCR-Fast is $0.19 cheaper per 1M output tokens (6.3% lower; 1.07x difference).

Larger context Nano Banana 2 (Gemini 3.1 Flash Image Preview) 65.54K vs 131.07K

Nano Banana 2 (Gemini 3.1 Flash Image Preview) has 65.54K more context (2x larger).

Sample workload Nano Banana 2 (Gemini 3.1 Flash Image Preview) $2.08 vs $2

Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.08 cheaper on the standard workload (4.1% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Qianfan-OCR-Fast Calculating… Estimated API cost

Nano Banana 2 (Gemini 3.1 Flash Image Preview) 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

Nano Banana 2 (Gemini 3.1 Flash Image Preview) has the lower input price; Qianfan-OCR-Fast has the lower output price; Nano Banana 2 (Gemini 3.1 Flash Image Preview) offers the larger context window. For the 1M input plus 500K output sample, Nano Banana 2 (Gemini 3.1 Flash Image Preview) is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $2.08 for Qianfan-OCR-Fast and $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview).

Best Fit

Choose Qianfan-OCR-Fast when you care most about lower output-token price.

Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) when you care most about lower input-token price, and larger context window.

Decision Notes

On the standard 1M input plus 500K output workload, Nano Banana 2 (Gemini 3.1 Flash Image Preview) is estimated at $2 vs $2.08 for Qianfan-OCR-Fast, saving $0.08 (4.1% lower).
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.08 cheaper on the standard workload (4.1% lower).
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.18 cheaper per 1M input tokens (26.5% lower; 1.36x difference).
Qianfan-OCR-Fast is $0.19 cheaper per 1M output tokens (6.3% lower; 1.07x difference).
Nano Banana 2 (Gemini 3.1 Flash Image Preview) has 65.54K more context (2x larger).

Head-to-Head Specs

Feature	Qianfan-OCR-Fast (Baidu)	Nano Banana 2 (Gemini 3.1 Flash Image Preview) (Google)
Input Price prompt tokens per 1M	$0.68	$0.5
Completion Price per 1M tokens	$2.81	$3
Sample Workload Cost 1M input + 500K output	$2.08	$2
Context Window	65.54K	131.07K
Release Date	2026-04-20	2026-02-26

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	On the standard 1M input plus 500K output workload, Nano Banana 2 (Gemini 3.1 Flash Image Preview) is estimated at $2 vs $2.08 for Qianfan-OCR-Fast, saving $0.08 (4.1% lower).
High-volume input processing	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Qianfan-OCR-Fast	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

ERNIE 4.5 21B A3B Thinking can replace Qianfan-OCR-Fast when lower sample workload cost matters most: $0.21.
ERNIE 4.5 21B A3B can replace Qianfan-OCR-Fast when lower sample workload cost matters most: $0.21.
ERNIE 4.5 VL 28B A3B can replace Qianfan-OCR-Fast when lower sample workload cost matters most: $0.42.
ERNIE 4.5 300B A47B can replace Qianfan-OCR-Fast when lower sample workload cost matters most: $0.83.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Grok 4.20 offers 2M context with $2.5 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.
Gemini 3.1 Flash Lite offers 1.05M context with $1 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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Baidu catalog

Review all tracked Baidu models before deciding whether this matchup is the right shortlist.

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Google catalog

Check other Google models with comparable pricing, context, or release timing.

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Qianfan-OCR-Fast

Qianfan-OCR-Fast is a domain-specific multimodal large model purpose-built for OCR. By leveraging specialized OCR training data while preserving versatile multimodal intelligence, it provides a powerful performance upgrade over Qianfan-OCR.

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Gemini 3.1 Flash Image Preview, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines...