API cost decision in 10 seconds

NewClaude Opus 4.7 (Fast) vs Seed 1.6 Flash

Pick Seed 1.6 Flash for lower cost; pick Claude Opus 4.7 (Fast) only if the larger context window matters more.

Page updated: 2026-05-26T10:03:26Z Data confirmed: 2026-05-26T12:43:06Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Seed 1.6 Flash for lower cost; pick Claude Opus 4.7 (Fast) only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Seed 1.6 Flash is estimated at $0.22 vs $105 for Claude Opus 4.7 (Fast), saving $104.78 (99.8% lower).

Cost-first pickSeed 1.6 Flash

Context-first pickClaude Opus 4.7 (Fast)

Sample savings$104.7899.8%

10x traffic gap$1047.75

Claude Opus 4.7 (Fast) has more context, but Seed 1.6 Flash saves $104.78 on the standard workload. At 10x that traffic, the same price gap is about $1047.75. 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	Claude Opus 4.7 (Fast)	Seed 1.6 Flash
Input-heavy / RAG	5M input + 500K output	Seed 1.6 Flash	$225	$0.53
Balanced workload	1M input + 1M output	Seed 1.6 Flash	$180	$0.38
Output-heavy chatbot	1M input + 5M output	Seed 1.6 Flash	$780	$1.57

Cheaper input Seed 1.6 Flash $30 vs $0.075 / 1M

Seed 1.6 Flash is $29.93 cheaper per 1M input tokens (99.8% lower; 400x difference).

Cheaper output Seed 1.6 Flash $150 vs $0.3 / 1M

Seed 1.6 Flash is $149.7 cheaper per 1M output tokens (99.8% lower; 500x difference).

Larger context Claude Opus 4.7 (Fast) 1M vs 262.14K

Claude Opus 4.7 (Fast) has 737.86K more context (3.81x larger).

Sample workload Seed 1.6 Flash $105 vs $0.22

Seed 1.6 Flash is $104.78 cheaper on the standard workload (99.8% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Claude Opus 4.7 (Fast) 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; Claude Opus 4.7 (Fast) 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 $105 for Claude Opus 4.7 (Fast) and $0.22 for Seed 1.6 Flash.

Best Fit

Choose Claude Opus 4.7 (Fast) when you care most about larger context window.

Choose Seed 1.6 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, Seed 1.6 Flash is estimated at $0.22 vs $105 for Claude Opus 4.7 (Fast), saving $104.78 (99.8% lower).
Seed 1.6 Flash is $104.78 cheaper on the standard workload (99.8% lower).
Seed 1.6 Flash is $29.93 cheaper per 1M input tokens (99.8% lower; 400x difference).
Seed 1.6 Flash is $149.7 cheaper per 1M output tokens (99.8% lower; 500x difference).
Claude Opus 4.7 (Fast) has 737.86K more context (3.81x larger).

Head-to-Head Specs

Feature	NewClaude Opus 4.7 (Fast) (Anthropic)	Seed 1.6 Flash (ByteDance Seed)
Input Price prompt tokens per 1M	$30	$0.075
Completion Price per 1M tokens	$150	$0.3
Sample Workload Cost 1M input + 500K output	$105	$0.22
Context Window	1M	262.14K
Release Date	2026-05-12	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 $105 for Claude Opus 4.7 (Fast), saving $104.78 (99.8% 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	Claude Opus 4.7 (Fast)	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 Claude Opus 4.7 (Fast) when lower sample workload cost matters most: $0.88.
Claude 3.5 Haiku can replace Claude Opus 4.7 (Fast) when lower sample workload cost matters most: $2.8.
Anthropic Claude Haiku Latest can replace Claude Opus 4.7 (Fast) when lower sample workload cost matters most: $3.5.
Claude Haiku 4.5 can replace Claude Opus 4.7 (Fast) when lower sample workload cost matters most: $3.5.

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-5.5 offers 1.05M context with $20 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

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.

Open largest context models

Provider catalogs

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

Open provider hubs

Anthropic catalog

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

Open Anthropic models

ByteDance Seed catalog

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

Open ByteDance Seed models

Claude Opus 4.7 (Fast)

Fast-mode variant of [Opus 4.7](/anthropic/claude-opus-4.7) - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

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...