GPT-5.4 vs GPT-5.5: API price and specs

GPT-5.4 is 50% cheaper than GPT-5.5 on input price.

GPT-5.4 is 50% cheaper than GPT-5.5 on output price.

GPT-5.4 is 50% cheaper than GPT-5.5 on a 1M-in / 200k-out workload.

Field	GPT-5.4	GPT-5.5
Lowest input, per 1M	$0.75	$1.50 +100%
Median input, per 1M	$2.50	$5.00 +100%
Lowest output, per 1M	$6.00	$12.00 +100%
Median output, per 1M	$15.00	$30.00 +100%
Lowest unit price	$0.001 / request	$0.001 / request
Cost of 1M in + 200k out	$1.95	$3.90 +100%
Context	1.1M	1.1M
Max output	128K	128K
Providers	33	30 +9.1%
Regions	EU, GLOBAL, US	EU, GLOBAL, US
Accepts	application/pdf, file, image, image/gif, image/jpeg, image/png, image/webp, pdf, text	application/pdf, file, image, image/gif, image/jpeg, image/png, image/webp, pdf, text
Returns	image, text	image, text
Type	Text models	Text models
Free option	no	no
Cheapest provider	xpersona	xpersona

Your own workload: how many tokens the model gets (input) and gives back (output) - for example, in a month. The "Cost" row of the table above is recalculated for these numbers, for each model.

Computed from current offers each time the page opens; the best value of a row is bold, the percent is how far behind the best.

Providers selling both

302ai, abacus, aihubmix, amazon-bedrock, azure, cometapi, daoxe, digitalocean, edenai, fastrouter, freemodel, github-copilot, impossibl, jiekou, kilo, meganova, nearai, ofox, openai, opencode, openrouter, orcarouter, perplexity-agent, poe, requesty, trustedrouter, vercel, xpersona, zenmux

Frequently asked questions

Which is cheaper, GPT-5.4 or GPT-5.5?

GPT-5.4 is 50% cheaper than GPT-5.5 on input price. GPT-5.4 is 50% cheaper than GPT-5.5 on output price. GPT-5.4 is 50% cheaper than GPT-5.5 on a 1M-in / 200k-out workload.

Which has the larger context, GPT-5.4 or GPT-5.5?

GPT-5.4: 1.1M tokens; GPT-5.5: 1.1M tokens.

Where can I use both GPT-5.4 and GPT-5.5?