GPT-4.1 Nano vs GPT-4o
At a Glance
| Compare |  GPT-4.1 NanoOpenAI | GPT-4oOpenAI |
|---|---|---|
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $0.050Openrouter ↗ · Sep 3, 2026 | $1.25Openrouter ↗ · Sep 22, 2026 |
| Output priceFrom · USD / 1M tokens | $0.20Openrouter ↗ · Sep 3, 2026 | $5.00Openrouter ↗ · Sep 22, 2026 |
| Context windowMaximum documented tokens | 1,048K | 128K |
| Model facts checked | Aug 29, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | GPT-4.1 Nano | GPT-4o |
|---|---|---|
| Aider Polyglotpolyglot-225-5dc9490bb35f · pass_rate_2 · leader | 8.8938% of row best · percent · whole; aider 0.81.4.dev | 23.11100% of row best · percent · diff; aider 0.70.1.dev |
| LMArena Text Arenatext-2026-09-13-d25aabda0010 · arena_rating · statistical tie | 1,284.72100% of row best · rating · gpt-4.1-nano-2025-04-14; 95% CI [1277.08013307, 1292.36659971]; votes 6103; rank 250 | 1,282.45100% of row best · rating · gpt-4o-2024-08-06; 95% CI [1278.25455133, 1286.63762056]; votes 45499; rank 254 |
| LMArena Vision Arenavision-2026-09-13-d25aabda0010 · arena_rating · statistical tie | 1,063.14100% of row best · rating · gpt-4.1-nano-2025-04-14; 95% CI [1044.85853307, 1081.42105669]; votes 1211; rank 124 | 1,064.56100% of row best · rating · gpt-4o-2024-08-06; 95% CI [1052.10383916, 1077.00692124]; votes 3376; rank 123 |
| Overall ResultCounted from the protocol-matched rows above · 2 ties | 0 benchmark winsNo overall winner | 1 benchmark winNo overall winner |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | GPT-4.1 Nano | GPT-4o |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Family | Gpt 4 1 | Gpt 4o |
| Model | GPT-4.1 Nano | GPT-4o |
| Version | GPT-4.1 Nano | GPT-4o |
| Lifecycle | active | active |
| Released | Unknown | Unknown |
| Knowledge cutoff | 2024-06-01 | 2023-10-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,048K | 128K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Openai (Standard), Openrouter (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, tools | chat, generation, tools |
GPT-4.1 Nano Capabilities
GPT-4o Capabilities
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Primary Evidence
Sources and Freshness
Questions
GPT-4.1 Nano vs GPT-4o FAQs
Is GPT-4.1 Nano or GPT-4o better for coding?+
GPT-4o leads the current coding subset with 1 benchmark win to 0. This describes only the matched benchmark rows shown above.
Which is cheaper, GPT-4.1 Nano or GPT-4o?+
GPT-4.1 Nano is $0.050 and GPT-4o is $1.25 per million tokens, so GPT-4.1 Nano is cheaper on this metric. GPT-4.1 Nano is $0.20 and GPT-4o is $5.00 per million tokens, so GPT-4.1 Nano is cheaper on this metric.
Which has a larger context window, GPT-4.1 Nano or GPT-4o?+
GPT-4.1 Nano has the larger sourced context window. GPT-4.1 Nano supports 1,048K and GPT-4o supports 128K.
Which performs better in benchmarks, GPT-4.1 Nano or GPT-4o?+
There is no overall benchmark winner: An overall winner requires at least two decisive benchmarks from at least two original publishers.
Can GPT-4.1 Nano or GPT-4o be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. GPT-4.1 Nano is not marked open weight; GPT-4o is not marked open weight.
Can GPT-4.1 Nano and GPT-4o understand images?+
GPT-4.1 Nano is documented with image input; GPT-4o is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, GPT-4.1 Nano or GPT-4o?+
GPT-4.1 Nano has the larger sourced maximum output: GPT-4.1 Nano supports 33K and GPT-4o supports 16K output tokens.
Do GPT-4.1 Nano and GPT-4o support reasoning and tool use?+
GPT-4.1 Nano: tool calling and image input. GPT-4o: tool calling and image input. Feature support does not establish relative quality.
Which is available from more inference providers, GPT-4.1 Nano or GPT-4o?+
GPT-4.1 Nano has 2 sourced provider routes; GPT-4o has 2, a tie.
Which offers better value, GPT-4.1 Nano or GPT-4o?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.