API cost decision in 10 seconds

🔥GPT-5.5 vs Gemini 2.0 Flash

Pick Gemini 2.0 Flash for lower cost; pick GPT-5.5 only if the larger context window matters more.

Page updated: 2026-05-26T15:08:08Z Data confirmed: 2026-05-26T18:08:02Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Gemini 2.0 Flash for lower cost; pick GPT-5.5 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Gemini 2.0 Flash is estimated at $0.3 vs $20 for GPT-5.5, saving $19.7 (98.5% lower).

Cost-first pickGemini 2.0 Flash

Context-first pickGPT-5.5

Sample savings$19.798.5%

10x traffic gap$197

GPT-5.5 has more context, but Gemini 2.0 Flash saves $19.7 on the standard workload. At 10x that traffic, the same price gap is about $197. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Gemini 2.0 Flash stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	GPT-5.5	Gemini 2.0 Flash
Input-heavy / RAG	5M input + 500K output	Gemini 2.0 Flash	$40	$0.7
Balanced workload	1M input + 1M output	Gemini 2.0 Flash	$35	$0.5
Output-heavy chatbot	1M input + 5M output	Gemini 2.0 Flash	$155	$2.1

Cheaper input Gemini 2.0 Flash $5 vs $0.1 / 1M

Gemini 2.0 Flash is $4.9 cheaper per 1M input tokens (98% lower; 50x difference).

Cheaper output Gemini 2.0 Flash $30 vs $0.4 / 1M

Gemini 2.0 Flash is $29.6 cheaper per 1M output tokens (98.7% lower; 75x difference).

Larger context GPT-5.5 1.05M vs 1M

GPT-5.5 has 50K more context (1.05x larger).

Sample workload Gemini 2.0 Flash $20 vs $0.3

Gemini 2.0 Flash is $19.7 cheaper on the standard workload (98.5% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GPT-5.5 Calculating… Estimated API cost

Gemini 2.0 Flash 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

Gemini 2.0 Flash has the lower input price; Gemini 2.0 Flash has the lower output price; GPT-5.5 offers the larger context window. For the 1M input plus 500K output sample, Gemini 2.0 Flash is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $20 for GPT-5.5 and $0.3 for Gemini 2.0 Flash.

Best Fit

Choose GPT-5.5 when you care most about larger context window.

Choose Gemini 2.0 Flash when you care most about lower input-token price, and lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Gemini 2.0 Flash is estimated at $0.3 vs $20 for GPT-5.5, saving $19.7 (98.5% lower).
Gemini 2.0 Flash is $19.7 cheaper on the standard workload (98.5% lower).
Gemini 2.0 Flash is $4.9 cheaper per 1M input tokens (98% lower; 50x difference).
Gemini 2.0 Flash is $29.6 cheaper per 1M output tokens (98.7% lower; 75x difference).
GPT-5.5 has 50K more context (1.05x larger).

Head-to-Head Specs

Feature	🔥GPT-5.5 (OpenAI)	Gemini 2.0 Flash (Google)
Input Price prompt tokens per 1M	$5	$0.1
Completion Price per 1M tokens	$30	$0.4
Sample Workload Cost 1M input + 500K output	$20	$0.3
Context Window	1.05M	1M
Release Date	2026-04-24	2025-02-05
Popularity	#17	#46

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Gemini 2.0 Flash	On the standard 1M input plus 500K output workload, Gemini 2.0 Flash is estimated at $0.3 vs $20 for GPT-5.5, saving $19.7 (98.5% lower).
High-volume input processing	Gemini 2.0 Flash	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Gemini 2.0 Flash	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	GPT-5.5	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

gpt-oss-120b (free) can replace GPT-5.5 when lower sample workload cost matters most: $0.
gpt-oss-20b (free) can replace GPT-5.5 when lower sample workload cost matters most: $0.
gpt-oss-20b can replace GPT-5.5 when lower sample workload cost matters most: $0.1.
gpt-oss-120b can replace GPT-5.5 when lower sample workload cost matters most: $0.13.

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.
Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.

Popular competitors

DeepSeek V4 Flash · DeepSeek · #1
Hy3 preview · Tencent · #2
Claude Opus 4.7 · Anthropic · #3
Claude Sonnet 4.6 · Anthropic · #4

Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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OpenAI catalog

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Google catalog

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