API cost decision in 10 seconds

Mercury 2 vs Seed 1.6 Flash

Pick Seed 1.6 Flash when budget and context both matter.

Page updated: 2026-05-26T10:03:26Z Data confirmed: 2026-05-26T13:08:02Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Seed 1.6 Flash when budget and context both matter.

On the standard 1M input plus 500K output workload, Seed 1.6 Flash is estimated at $0.22 vs $0.62 for Mercury 2, saving $0.4 (64% lower).

Cost-first pickSeed 1.6 Flash

Context-first pickSeed 1.6 Flash

Sample savings$0.464%

10x traffic gap$4

Seed 1.6 Flash is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $4. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Seed 1.6 Flash stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Mercury 2	Seed 1.6 Flash
Input-heavy / RAG	5M input + 500K output	Seed 1.6 Flash	$1.62	$0.53
Balanced workload	1M input + 1M output	Seed 1.6 Flash	$1	$0.38
Output-heavy chatbot	1M input + 5M output	Seed 1.6 Flash	$4	$1.57

Cheaper input Seed 1.6 Flash $0.25 vs $0.075 / 1M

Seed 1.6 Flash is $0.17 cheaper per 1M input tokens (70% lower; 3.33x difference).

Cheaper output Seed 1.6 Flash $0.75 vs $0.3 / 1M

Seed 1.6 Flash is $0.45 cheaper per 1M output tokens (60% lower; 2.5x difference).

Larger context Seed 1.6 Flash 128K vs 262.14K

Seed 1.6 Flash has 134.14K more context (2.05x larger).

Sample workload Seed 1.6 Flash $0.62 vs $0.22

Seed 1.6 Flash is $0.4 cheaper on the standard workload (64% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Mercury 2 Calculating… Estimated API cost

Seed 1.6 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

Seed 1.6 Flash has the lower input price; Seed 1.6 Flash has the lower output price; Seed 1.6 Flash offers the larger context window. For the 1M input plus 500K output sample, Seed 1.6 Flash is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.62 for Mercury 2 and $0.22 for Seed 1.6 Flash.

Best Fit

Choose Mercury 2 when its provider, model quality, latency, or availability is more important than the numeric price/context winner.

Choose Seed 1.6 Flash when you care most about lower input-token price, lower output-token price, and larger context window.

Decision Notes

On the standard 1M input plus 500K output workload, Seed 1.6 Flash is estimated at $0.22 vs $0.62 for Mercury 2, saving $0.4 (64% lower).
Seed 1.6 Flash is $0.4 cheaper on the standard workload (64% lower).
Seed 1.6 Flash is $0.17 cheaper per 1M input tokens (70% lower; 3.33x difference).
Seed 1.6 Flash is $0.45 cheaper per 1M output tokens (60% lower; 2.5x difference).
Seed 1.6 Flash has 134.14K more context (2.05x larger).

Head-to-Head Specs

Feature	Mercury 2 (Inception)	Seed 1.6 Flash (ByteDance Seed)
Input Price prompt tokens per 1M	$0.25	$0.075
Completion Price per 1M tokens	$0.75	$0.3
Sample Workload Cost 1M input + 500K output	$0.62	$0.22
Context Window	128K	262.14K
Release Date	2026-03-04	2025-12-23

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Seed 1.6 Flash	On the standard 1M input plus 500K output workload, Seed 1.6 Flash is estimated at $0.22 vs $0.62 for Mercury 2, saving $0.4 (64% lower).
High-volume input processing	Seed 1.6 Flash	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Seed 1.6 Flash	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Seed 1.6 Flash	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

No lower-cost same-provider swap is currently tracked for this pair.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.
DeepSeek V4 Flash offers 1.05M context with $0.2 sample workload cost.
Gemini 2.5 Flash Lite offers 1.05M context with $0.3 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

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

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Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

Open provider hubs

Inception catalog

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

Open Inception models

ByteDance Seed catalog

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

Open ByteDance Seed models

Mercury 2

Mercury 2 is an extremely fast reasoning LLM, and the first reasoning diffusion LLM (dLLM). Instead of generating tokens sequentially, Mercury 2 produces and refines multiple tokens in parallel, achieving...

Seed 1.6 Flash

Seed 1.6 Flash is an ultra-fast multimodal deep thinking model by ByteDance Seed, supporting both text and visual understanding. It features a 256k context window and can generate outputs of...