Can I run Ernie 4p5 21b A3b Pt or gpt-oss-20b cheaper on another provider?

Some models are available on inference providers like Together AI, Groq, and Fireworks AI at lower prices. Check each model's pricing page for the full provider comparison.

What is the context window difference between Ernie 4p5 21b A3b Pt and gpt-oss-20b?

gpt-oss-20b has a larger context window at 131K tokens vs 4K. This matters for long documents, large codebases, and extended conversation histories.

Compare

Ernie 4p5 21b A3b Pt vs gpt-oss-20b

Pricing is only the shared seller matrix below. Best rates and catalog map are separate sections, so no chart is embedded in pricing. Open the calculator for the same workload on each side.

Fireworks Ai

Model

Ernie 4p5 21b A3b Pt

Best $0.100 in · $0.100 out

Context window 4K

Pricing

OpenAI

Model

gpt-oss-20b

Tool calling

Best $0.020 in · $0.100 out

Context window 131K

Pricing

gpt-oss-20b is cheaper across the board — 80% cheaper on input and 0% cheaper on output.

Estimate cost

Pricing matrix

Shared sellers only. Each row is a host that lists both models. Dollar amounts are per 1M tokens. Lowest in each pair of columns is emphasized.

Provider	Ernie 4p5 21b A3b Pt in	Ernie 4p5 21b A3b Pt out	gpt-oss-20b in	gpt-oss-20b out
DeepInfra	N/A	N/A	$0.040	$0.150
Fireworks AI	$0.100	$0.100	$0.050	$0.200
Groq	N/A	N/A	$0.075	$0.300
Novita	N/A	N/A	$0.040	$0.150
Openrouter	N/A	N/A	$0.020	$0.100
Ovhcloud	N/A	N/A	$0.040	$0.150
Replicate	N/A	N/A	$0.090	$0.360
Together AI	N/A	N/A	$0.050	$0.200
Wandb	N/A	N/A	$5000.00	$20000.00

Best listed rates (this pair)

Same "best row in current pricing" logic as model pages: a compact view of the lowest input and output we show for each side. This is not the seller matrix.

Catalog map · Fireworks Ai · OpenAI

Each chart uses real catalog rows that include both list input and list output ($/1M). Larger green dots are the models on this comparison page; accent dots are other active models from that provider.

Fireworks Ai · input vs output

Scatter chart: X = input $/M, Y = output $/M. This page's models are labeled on the green dots; hover others for detail.

ListedoutputUSD/1M

One dot per catalog row that has both list prices. Green dots are labeled with the models on this page; hover any dot for name and prices. Upper-right means higher cost on both axes ($/1M).

OpenAI · input vs output

ListedoutputUSD/1M

One dot per catalog row that has both list prices. Green dots are labeled with the models on this page; hover any dot for name and prices. Upper-right means higher cost on both axes ($/1M).

Specifications

Each column header is the full model name. Tint marks the favorable value where we compute a winner.

Spec

Ernie 4p5 21b A3b Pt

gpt-oss-20b

Context window: 4,096 tokens; 131,072 tokens
Max output tokens: 4,096 tokens; 131,072 tokens
Vision: No; No
Function calling: No; Yes
Streaming: No; No
Release date: N/A; Aug 2025

Cost calculator

Same requests, input tokens, and output tokens for both columns. Pick the provider row that matches how you buy.

Ernie 4p5 21b A3b Pt

gpt-oss-20b

Requests / day

Input tokens

Output tokens

Ernie 4p5 21b A3b Pt

Monthly

$45

Annual

$548

gpt-oss-20b

Monthly

$21

Annual

$255

Save $24/month with gpt-oss-20b

When to pick which

Short takeaways: no cards, just the points. Validate with your own workloads.

Long-context tasks
Use gpt-oss-20b. Its 131K context window handles large codebases and documents better than 4K.
Long output (reports, code files)
Use gpt-oss-20b. Its 131K max output limit reduces the need to split requests.

Frequently asked questions

gpt-oss-20b is cheaper on both input and output tokens.

More comparisons

Other popular head-to-head matchups.