API cost decision in 10 seconds

🔥GPT-6.1 Sol vs Pareto 26.9

Pick Pareto 26.9 for lower cost; pick GPT-6.1 Sol only if the larger context window matters more.

Page updated: 2026-10-14T04:07:47Z Data confirmed: 2026-11-03T02:07:44Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Pareto 26.9 for lower cost; pick GPT-6.1 Sol only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Pareto 26.9 is estimated at $6.25 vs $7 for GPT-6.1 Sol, saving $0.75 (10.7% lower).

Cost-first pickPareto 26.9

Context-first pickGPT-6.1 Sol

Sample savings$0.7510.7%

10x traffic gap$7.5

GPT-6.1 Sol has more context, but Pareto 26.9 saves $0.75 on the standard workload. At 10x that traffic, the same price gap is about $7.5. 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 GPT-6.1 Sol, balanced workload favors Pareto 26.9, and output-heavy chatbot favors Pareto 26.9.

Workload shape	Token mix	Better pick	GPT-6.1 Sol	Pareto 26.9
Input-heavy / RAG	5M input + 500K output	GPT-6.1 Sol	$15	$16.25
Balanced workload	1M input + 1M output	Pareto 26.9	$12	$10
Output-heavy chatbot	1M input + 5M output	Pareto 26.9	$52	$40

Cheaper input GPT-6.1 Sol $2 vs $2.5 / 1M

GPT-6.1 Sol is $0.5 cheaper per 1M input tokens (20% lower; 1.25x difference).

Cheaper output Pareto 26.9 $10 vs $7.5 / 1M

Pareto 26.9 is $2.5 cheaper per 1M output tokens (25% lower; 1.33x difference).

Larger context GPT-6.1 Sol 1.05M vs 262.14K

GPT-6.1 Sol has 787.86K more context (4.01x larger).

Sample workload Pareto 26.9 $7 vs $6.25

Pareto 26.9 is $0.75 cheaper on the standard workload (10.7% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GPT-6.1 Sol Calculating… Estimated API cost

Pareto 26.9 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

GPT-6.1 Sol has the lower input price; Pareto 26.9 has the lower output price; GPT-6.1 Sol offers the larger context window. For the 1M input plus 500K output sample, Pareto 26.9 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $7 for GPT-6.1 Sol and $6.25 for Pareto 26.9.

Best Fit

Choose GPT-6.1 Sol when you care most about lower input-token price, and larger context window.

Choose Pareto 26.9 when you care most about lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Pareto 26.9 is estimated at $6.25 vs $7 for GPT-6.1 Sol, saving $0.75 (10.7% lower).
Pareto 26.9 is $0.75 cheaper on the standard workload (10.7% lower).
GPT-6.1 Sol is $0.5 cheaper per 1M input tokens (20% lower; 1.25x difference).
Pareto 26.9 is $2.5 cheaper per 1M output tokens (25% lower; 1.33x difference).
GPT-6.1 Sol has 787.86K more context (4.01x larger).

Head-to-Head Specs

Feature	🔥GPT-6.1 Sol (OpenAI)	Pareto 26.9 (unbiased)
Input Price prompt tokens per 1M	$2	$2.5
Completion Price per 1M tokens	$10	$7.5
Sample Workload Cost 1M input + 500K output	$7	$6.25
Context Window	1.05M	262.14K
Release Date	2026-09-29	2026-10-13
Popularity	#11

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Pareto 26.9	On the standard 1M input plus 500K output workload, Pareto 26.9 is estimated at $6.25 vs $7 for GPT-6.1 Sol, saving $0.75 (10.7% lower).
High-volume input processing	GPT-6.1 Sol	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Pareto 26.9	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	GPT-6.1 Sol	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-6.1 Sol when lower sample workload cost matters most: $0.
gpt-oss-20b (free) can replace GPT-6.1 Sol when lower sample workload cost matters most: $0.
gpt-oss-20b (batch) can replace GPT-6.1 Sol when lower sample workload cost matters most: $0.08.
gpt-oss-20b can replace GPT-6.1 Sol when lower sample workload cost matters most: $0.1.

Larger context near this budget

Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
Grok 4.20 offers 2M context with $2.5 sample workload cost.
Llama 4 Scout offers 1.31M context with $0.25 sample workload cost.

Popular competitors

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DeepSeek V4.1 Flash 1017 · DeepSeek · #2
GLM 5.3 Flash · Z.ai · #3
DeepSeek V4.1 Flash · DeepSeek · #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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unbiased catalog

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GPT-6.1 Sol

GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series. It is suited for agentic coding, computer use, document-heavy professional...

Pareto 26.9

Pareto is a multimodal composite model built for research, coding, and agentic workflows, while delivering frontier-level performance across a broad range of general-purpose tasks.