Claude Opus 4.8 vs GPT-5.4
Benchmark Performance
Available Benchmarks
| Benchmark | Claude Opus 4.8 | GPT-5.4 |
|---|---|---|
| ARC-AGI-1verified-v1-15fb467fd4fc · verified_score · leader | 92.5099% of row best · percent · Claude Opus 4.8 (Max) | 93.67100% of row best · percent · GPT-5.4 (XHigh) |
| ARC-AGI-2verified-v2-9a3db289984e · verified_score · leader | 72.0897% of row best · percent · Claude Opus 4.8 (High) | 73.95100% of row best · percent · GPT-5.4 (XHigh) |
| LMArena Document Arenadocument-2026-07-30-011508720696 · arena_rating · statistical tie | 1,468.90100% of row best · rating · claude-opus-4-8; 95% CI [1460.58009276, 1477.22476172]; votes 8193; rank 16 | 1,470.14100% of row best · rating · gpt-5.4; 95% CI [1463.54357191, 1476.73400825]; votes 29809; rank 15 |
| LMArena Search Arenasearch-2026-08-24-011508720696 · arena_rating · statistical tie | 1,204.30100% of row best · rating · claude-opus-4-8; 95% CI [1197.89112684, 1210.71069451]; votes 70998; rank 12 | 1,197.1699% of row best · rating · gpt-5.4-search; 95% CI [1191.73811150, 1202.57682579]; votes 110116; rank 16 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · statistical tie | 1,451.98100% of row best · rating · claude-opus-4-8; 95% CI [1447.69484580, 1456.25837678]; votes 49123; rank 38 | 1,452.51100% of row best · rating · gpt-5.4; 95% CI [1448.73439083, 1456.28324387]; votes 63615; rank 37 |
| LMArena Vision Arenavision-2026-08-27-011508720696 · arena_rating · statistical tie | 1,288.81100% of row best · rating · claude-opus-4-8; 95% CI [1281.38044914, 1296.24567110]; votes 13980; rank 23 | 1,293.18100% of row best · rating · gpt-5.4; 95% CI [1286.41064849, 1299.95761489]; votes 21245; rank 20 |
| LiveBench2026-06-25 · overall · leader | 81.1899% of row best · percent · claude-opus-4-8-max-effort · 24,171 output tokens / case | 82.38100% of row best · percent · gpt-5.4-xhigh · 18,273 output tokens / case |
| ToneBench2026-08-28-10-task-cd9819ab6e4d · overall_score · leader | 87.91100% of row best · points · Claude Opus 4.8 (max effort) · 2,741 output tokens / case | 82.4794% of row best · points · GPT-5.4 · 3,254 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above · 4 ties | 1 benchmark win | 3 benchmark winsOverall lead |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Claude Opus 4.8 | GPT-5.4 |
|---|---|---|
| Developer | Anthropic | Openai |
| Family | Claude 4 8 | Gpt 5 4 |
| Model | Claude Opus 4.8 | GPT-5.4 |
| Version | Claude Opus 4.8 | GPT-5.4 |
| Lifecycle | active | active |
| Released | 2026-05-28 | 2026-03-05 |
| Knowledge cutoff | 2026-01-01 | 2025-08-31 |
| Input modalities | Unknown | Unknown |
| Output modalities | Unknown | Unknown |
| Context window | 1,000,000 | 1,050,000 |
| 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), Deepinfra (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, structured_outputs, tools |
13 comparable fields · 9 material differences · Interactive comparison only; indexing gate not met
Claude Opus 4.8 Capabilities
GPT-5.4 Capabilities
Internal Comparison Graph
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|---|---|---|---|
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Primary Evidence
Sources and Freshness
Questions
Claude Opus 4.8 vs GPT-5.4 FAQs
Is Claude Opus 4.8 or GPT-5.4 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Opus 4.8 and GPT-5.4, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Opus 4.8 or GPT-5.4?+
Claude Opus 4.8 is $5.00 and GPT-5.4 is $2.50 per million tokens, so GPT-5.4 is cheaper on this metric. Claude Opus 4.8 is $25.00 and GPT-5.4 is $15.00 per million tokens, so GPT-5.4 is cheaper on this metric.
Which has a larger context window, Claude Opus 4.8 or GPT-5.4?+
GPT-5.4 has the larger sourced context window. Claude Opus 4.8 supports 1,000,000 and GPT-5.4 supports 1,050,000.
Which performs better in benchmarks, Claude Opus 4.8 or GPT-5.4?+
GPT-5.4 leads the current overall benchmark count. The result uses 8 protocol-matched benchmarks from 4 publishers; it is not a universal quality score.
Can Claude Opus 4.8 or GPT-5.4 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Opus 4.8 is not marked open weight; GPT-5.4 is not marked open weight.
Can Claude Opus 4.8 and GPT-5.4 understand images?+
Claude Opus 4.8 is not documented with image input; GPT-5.4 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Opus 4.8 or GPT-5.4?+
Neither has a larger sourced maximum output. Claude Opus 4.8 is 128,000 and GPT-5.4 is 128,000.
Do Claude Opus 4.8 and GPT-5.4 support reasoning and tool use?+
Claude Opus 4.8: reasoning and tool calling. GPT-5.4: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Opus 4.8 or GPT-5.4?+
Claude Opus 4.8 has 2 sourced provider routes; GPT-5.4 has 2, a tie.
Which offers better value, Claude Opus 4.8 or GPT-5.4?+
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.