GPT-5 Chat vs Gemini 4 Argon
Gemini 4 Argon comes out ahead, 52 to 31 on our weighted score, though GPT-5 Chat is 14% cheaper per token.
OpenAIGPT-5 Chat
31/100- ECI—
- Price$1.25 / $10.00
- Context400K
- Our pick
GoogleGemini 4 Argon
52/100- ECI166.1
- Price$2.00 / $10.00
- Context1.05M
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Make it a three-way comparison.
Gemini 4 Argon is our pick
Gemini 4 Argon is the better all-round choice, scoring 52/100 against GPT-5 Chat (31). It leads on inputs & features and context window. GPT-5 Chat wins on price. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceGPT-5 ChatGPT-5 Chat $3.44 · Gemini 4 Argon $4.00 per 1M tokens (3:1 blend)
- Longest contextGemini 4 ArgonGemini 4 Argon 1,048,576 · GPT-5 Chat 400,000 tokens
- Widest inputsGemini 4 ArgonGPT-5 Chat: Text, Images · Gemini 4 Argon: Text, Images, PDFs, Audio, Video
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | GPT-5 Chat | Gemini 4 Argon |
|---|---|---|---|
| Price | 50% | 23 | 20 |
| Inputs & features | 30% | 35 | 100 |
| Context window | 20% | 44 | 61 |
| Overall | 100% | 31/100 | 52/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GPT-5 ChatOpenAI | Gemini 4 ArgonGoogle |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | 166.1 |
| ECI rank | — | #7 of 165 |
| GPQA DiamondGraduate-level science questions | — | 96.4% |
| FrontierMath Tiers 1–3Research-level mathematics | — | 86.0% |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 100% |
| SimpleQA VerifiedShort factual questions | — | 76.0% |
| Price per million tokens | ||
| Input | $1.25 (best) | $2.00 |
| Output | $10.00 | $10.00 |
| Cached input | — | $0.10 |
| Blended (3:1) | $3.44 (best) | $4.00 |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 5 providers | Official Google API |
| Limits | ||
| Context window | 400,000 tokens | 1,048,576 tokens (best) |
| Max output | 128,000 tokens (best) | 65,536 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | Yes |
| Audio | No | Yes |
| Video | No | Yes |
| Reasoning | Yes | Yeslow · medium · high |
| Tool calling | No | Yes |
| Structured output | No | Yes |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | — | gemini-4-argon |
| API providers | 5 | 24 (best) |
| Released | Aug 7, 2025 | Oct 13, 2026 |
| Knowledge cutoff | Sep 30, 2024 | Mar 2026 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- GPT-5 Chat$32.50
- Gemini 4 Argon$40.00
Which should you choose?
Which is better: GPT-5 Chat or Gemini 4 Argon?
Gemini 4 Argon is the better all-round choice, scoring 52/100 against GPT-5 Chat (31). It leads on inputs & features and context window. GPT-5 Chat wins on price. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, GPT-5 Chat or Gemini 4 Argon?
GPT-5 Chat is cheaper at $1.25 input / $10.00 output per million tokens (median across 5 API providers). Gemini 4 Argon costs $2.00 input / $10.00 output per million tokens (official Google API price). At a typical mix of three input tokens to one output token, that is $3.44 per million tokens for GPT-5 Chat versus $4.00 for Gemini 4 Argon (1.2× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. GPT-5 Chat has not been scored yet and Gemini 4 Argon has an ECI of 166.1.
Which is better for coding?
There are no published SWE-bench Verified results for GPT-5 Chat and Gemini 4 Argon yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that GPT-5 Chat does not support tool calling, which most coding agents need.
Which has the bigger context window?
Gemini 4 Argon has the largest context window at 1,048,576 tokens, against 400,000 for GPT-5 Chat. Maximum output per response: GPT-5 Chat up to 128,000, Gemini 4 Argon up to 65,536 tokens.
Which can read images, PDFs, audio or video?
GPT-5 Chat accepts text and images; Gemini 4 Argon accepts text, images, PDFs, audio and video. Gemini 4 Argon handles the widest range of inputs.
Are any of these open source?
No. GPT-5 Chat and Gemini 4 Argon are proprietary and only available through APIs and apps.
Which is newer?
Gemini 4 Argon is the newest, released Oct 13, 2026. GPT-5 Chat came out Aug 7, 2025. Knowledge cutoff: GPT-5 Chat Sep 30, 2024, Gemini 4 Argon Mar 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
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