Claude Opus 4.5 vs GPT-5.4 Nano
At a Glance
| Compare | Claude Opus 4.5Anthropic |  GPT-5.4 NanoOpenAI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v4.4 | UnrankedNot in the 57-model eligible cohort | #38 of 5715.7 score · 3/3 sources · complete |
| CostLower is better · Published-token output estimate | UnrankedNot in the 27-model eligible cohort | #11 of 27$0.058 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.9 | UnrankedNot in the 27-model eligible cohort | #26 of 2729.9 score · 3/3 sources · complete |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $5.00Anthropic ↗ · Sep 3, 2026 | $0.20Openai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | $25.00Anthropic ↗ · Sep 3, 2026 | $1.25Openai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 200K | 400K |
| Model facts checked | Sep 3, 2026View model evidence → | Sep 3, 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 | Claude Opus 4.5 | GPT-5.4 Nano |
|---|---|---|
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e · arena_rating · leader | 1,448.19100% of row best · rating · claude-opus-4-5-20251101-high-32k; 95% CI [1444.36613918, 1452.02144591]; votes 37509; rank 54 | 1,372.0195% of row best · rating · gpt-5.4-nano-high; 95% CI [1368.25704083, 1375.76986498]; votes 62396; rank 182 |
| LiveBench2026-06-25-90f8d44da965 · overall · leader | 77.39100% of row best · percent · claude-opus-4-5-20251101-thinking-64k-high-effort · 15,203 output tokens / case | 75.2797% of row best · percent · gpt-5.4-nano-xhigh · 46,179 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 2 benchmark winsOverall lead | 0 benchmark wins |
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 | Claude Opus 4.5 | GPT-5.4 Nano |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Family | Claude 4 | Gpt 5 4 |
| Model | Claude Opus 4.5 | GPT-5.4 Nano |
| Version | Claude Opus 4.5 | GPT-5.4 Nano |
| Lifecycle | active | active |
| Released | 2025-11-24 | 2026-03-17 |
| Knowledge cutoff | 2025-05-01 | 2025-08-31 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 200K | 400K |
| 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 | Anthropic (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation, reasoning, structured_outputs, tools |
Claude Opus 4.5 Capabilities
GPT-5.4 Nano Capabilities
Related Comparisons
All image comparisons →| A | Pair | B | Context |
|---|---|---|---|
Claude Opus 4.5Anthropic | vs | cross-developer peersimage, text | |
Claude Haiku 4.5Anthropic | vs | Claude Opus 4.5Anthropic | family variantsimage, text |
Claude Opus 4.5Anthropic | vs | Claude Opus 4.6Anthropic | family variantsimage, text |
Claude Opus 4.5Anthropic | vs | Claude Opus 4.7Anthropic | family variantsimage, text |
Claude Opus 4.5Anthropic | vs | Claude Sonnet 4.5Anthropic | family variantsimage, text |
Claude Opus 4.5Anthropic | vs | Seed 1.8ByteDance Seed | cross-developer peersimage, text |
Claude Opus 4.5Anthropic | vs |  Gemma 4 12BGoogle DeepMind | cross-developer peersimage, text |
Claude Opus 4.5Anthropic | vs | GPT-5OpenAI | cross-developer peersimage, text |
Claude Opus 4.5Anthropic | vs | GPT-5.3-CodexOpenAI | cross-developer peersimage, text |
Claude Opus 4.5Anthropic | vs | o3OpenAI | cross-developer peersimage, text |
Claude Opus 4.5Anthropic | vs | o3-proOpenAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Opus 4.5 vs GPT-5.4 Nano FAQs
Is Claude Opus 4.5 or GPT-5.4 Nano better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Opus 4.5 and GPT-5.4 Nano, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Opus 4.5 or GPT-5.4 Nano?+
Claude Opus 4.5 is $5.00 and GPT-5.4 Nano is $0.20 per million tokens, so GPT-5.4 Nano is cheaper on this metric. Claude Opus 4.5 is $25.00 and GPT-5.4 Nano is $1.25 per million tokens, so GPT-5.4 Nano is cheaper on this metric.
Which has a larger context window, Claude Opus 4.5 or GPT-5.4 Nano?+
GPT-5.4 Nano has the larger sourced context window. Claude Opus 4.5 supports 200,000 tokens and GPT-5.4 Nano supports 400,000 tokens.
Which performs better in benchmarks, Claude Opus 4.5 or GPT-5.4 Nano?+
Claude Opus 4.5 leads the current overall benchmark count. The result uses 2 protocol-matched benchmarks from 2 publishers; it is not a universal quality score.
Can Claude Opus 4.5 or GPT-5.4 Nano be self-hosted?+
Both models have the same sourced self-hosting status: unsupported. Claude Opus 4.5 is not marked open weight; GPT-5.4 Nano is not marked open weight.
Can Claude Opus 4.5 and GPT-5.4 Nano understand images?+
Claude Opus 4.5 is documented with image input; GPT-5.4 Nano is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Opus 4.5 or GPT-5.4 Nano?+
GPT-5.4 Nano has the larger sourced maximum output. Claude Opus 4.5 supports 64,000 tokens and GPT-5.4 Nano supports 128,000 tokens.
Do Claude Opus 4.5 and GPT-5.4 Nano support reasoning and tool use?+
Claude Opus 4.5: reasoning, tool calling, and image input. GPT-5.4 Nano: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Opus 4.5 or GPT-5.4 Nano?+
Claude Opus 4.5 has 1 sourced provider route; GPT-5.4 Nano has 2, so GPT-5.4 Nano has broader tracked availability.
Which offers better value, Claude Opus 4.5 or GPT-5.4 Nano?+
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.