Gemini 2.5 Pro vs GPT-5.1-Codex.
model vs model · prices as of
Gemini 2.5 Pro takes 2 of 5 rounds against GPT-5.1-Codex. It is also the cheaper of the two to run, at $9.61 per million tokens against $12.30.
Googlewins 2 roundsGemini 2.5 Pro
$9.61/M tokens
cheapest we can explain, at Poe · $0.942 per 1,000 pages
1M context · tool calling · reads images
OpenAIGPT-5.1-Codex
$12.30/M tokens
cheapest we can explain, at Poe · $1.20 per 1,000 pages
400k context · tool calling · reads images
List price in (lower wins)
$1.25/M
$1.25/M
List price out (lower wins)
$10/M
$10/M
Cheapest we can explain (lower wins)
$9.61/M at Poe
$12.30/M at Poe
Standard price (lower wins)
$13.75/M
$13.75/M
Cost per 1,000 pages (lower wins)
$0.942
$1.20
Context
1M tokens
400k tokens
Open weights
no
not stated
Tool calling
yes
yes
Structured output
yes
yes
Reads images
yes
yes
Reasoning
yes
yes
Released
17 Jun 2025
13 Nov 2025
Providers selling it
37
19
Price we measure against
the maker's own
OpenRouter
Trains on your prompts (no is better)
not stated
not stated
Providers selling both · 15
Poe$9.61 / $12.30
Jiekou$13.06 / $13.06
Abacus$13.75 / $13.75
AIHubMix$13.75 / $13.75
Eden AI$13.75 / $13.75
Helicone$13.75 / $13.75
Impossibl$13.75 / $13.75
Kilo Gateway$13.75 / $13.75
Gemini 2.5 Pro then GPT-5.1-Codex, per million tokens · showing the 8 cheapest of 15
Go further
Add a third or fourth model, or switch the weighting, in the tool.
What moved in the last seven days
- Gemini 2.5 Pro
Nous Portal$1 / $8 $1.25 / $1025% dearer · - Gemini 2.5 ProPoe$1.26 / $10.10 $0.87 / $731% cheaper ·
- GPT-5.1-CodexNous Portal$1 / $8 $1.25 / $1025% dearer ·
Frequently asked
- Which is cheaper, Gemini 2.5 Pro or GPT-5.1-Codex?
- Gemini 2.5 Pro, at $9.61 per million tokens against $12.30 for GPT-5.1-Codex, three parts input to one part output, read on 16 Sept 2026.
- Where is each one cheapest?
- Gemini 2.5 Pro: $9.61 at Poe. GPT-5.1-Codex: $12.30 at Poe.
- Can I buy both from one provider?
- Yes. 15 providers sell both: Poe, Jiekou, Abacus, AIHubMix, Eden AI, Helicone, and more. The cheapest of them for the two together is Poe.
- Which holds more context?
- Gemini 2.5 Pro, at 1M tokens against 400k.
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.