GPT-5.3 Chat (latest) vs GPT-5.3 Codex.
model vs model · prices as of
GPT-5.3 Codex takes 2 of 5 rounds against GPT-5.3 Chat (latest). It is also the cheaper of the two to run, at $17.50 per million tokens against $19.25.
OpenAIGPT-5.3 Chat (latest)
$19.25/M tokens
OpenAI list price, nothing below it is accounted for · $1.89 per 1,000 pages
128k context · tool calling · reads images
OpenAIwins 2 roundsGPT-5.3 Codex
$17.50/M tokens
cheapest we can explain, at Poe · $1.72 per 1,000 pages
400k context · tool calling · reads images
List price in (lower wins)
$1.75/M
$1.75/M
List price out (lower wins)
$14/M
$14/M
Cheapest we can explain (lower wins)
none below list
$17.50/M at Poe
Standard price (lower wins)
$19.25/M
$19.25/M
Cost per 1,000 pages (lower wins)
$1.89
$1.72
Context
128k tokens
400k tokens
Open weights
no
no
Tool calling
yes
yes
Structured output
yes
yes
Reads images
yes
yes
Reasoning
no
yes
Released
3 Mar 2026
5 Feb 2026
Providers selling it
6
31
Price we measure against
the maker's own
the maker's own
Trains on your prompts (no is better)
no provider to check
not stated
Providers selling both · 4
Abacus$19.25 / $19.25- OpenAI$19.25 / $19.25
Opper$19.25 / $19.25
ZenMux$19.25 / $19.25
GPT-5.3 Chat (latest) then GPT-5.3 Codex, per million tokens
Go further
Add a third or fourth model, or switch the weighting, in the tool.
What moved in the last seven days
- GPT-5.3 Codex
Nous Portal$1.40 / $11.20 $1.75 / $1425% dearer ·
Frequently asked
- Which is cheaper, GPT-5.3 Chat (latest) or GPT-5.3 Codex?
- GPT-5.3 Codex, at $17.50 per million tokens against $19.25 for GPT-5.3 Chat (latest), three parts input to one part output, read on 16 Sept 2026.
- Where is each one cheapest?
- GPT-5.3 Chat (latest): nobody goes below the maker's own price with a reason we can point at, so $19.25 is the number to beat. GPT-5.3 Codex: $17.50 at Poe.
- Can I buy both from one provider?
- Yes. 4 providers sell both: Abacus, OpenAI, Opper, ZenMux. The cheapest of them for the two together is Abacus.
- Which holds more context?
- GPT-5.3 Codex, at 400k tokens against 128k.
Prices exclude tax and are per million tokens, read 16 Sept 2026 from each provider's own catalog. The standard price blends three parts input to one part output; a page is 600 tokens in and 60 out. Bars are scaled to the larger value in each row.