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© 2026 CompareLLM. Public benchmark data aggregated from Arena Elo, LiveBench, SWE-bench & OpenRouter.

Every score has a dated snapshot.

  1. Home
  2. Models
  3. Llama 3.1 405B
MetaOpen Weights

Llama 3.1 405B

Llama 3.1 405B is a Meta open-weight catalog model. Latest preference Elo in this catalog is 1,370 (seed-bootstrap (Aug 1, 2026)). SWE-bench sits at 58.4% (seed-bootstrap (Aug 1, 2026)). List output price is $3.5/1M. Context window is 128k tokens. Meta flagship open-weight 405B dense foundation model with 128k context window. Numbers below are dated snapshots, not a guarantee on your traffic mix.

At a glance

Llama 3.1 405B is a Meta open-weight catalog model. Latest preference Elo in this catalog is 1,370 (seed-bootstrap (Aug 1, 2026)). SWE-bench sits at 58.4% (seed-bootstrap (Aug 1, 2026)). List output price is $3.5/1M. Context window is 128k tokens. Meta flagship open-weight 405B dense foundation model with 128k context window. Numbers below are dated snapshots, not a guarantee on your traffic mix.
Last updated Aug 1, 2026
All 69 vsSave Model

Compare Llama 3.1 405B against

Capability Profile

Llama 3.1 405B Benchmark Percentiles

Plotted against all active catalog models (50th percentile = catalog median).

Llama 3.1 405B
Median (50)

Dimensional Scorecards

Reasoning
33%
Coding
20%
Math
37%
Speed
6%
Value
35%
Context
15%

Benchmark Specifications

Dated snapshot metrics aggregated from official evaluators and API providers.

Preference Elo1,370
seed-bootstrap · Aug 1, 2026
Coding Elo1,385
seed-bootstrap · Aug 1, 2026
LiveBench61.2%
seed-bootstrap · Aug 1, 2026
SWE-bench58.4%
seed-bootstrap · Aug 1, 2026
GPQA Diamond75.2%
seed-bootstrap · Aug 1, 2026
Time to first token360 ms
seed-bootstrap · Aug 1, 2026
Output speed42 tok/s
seed-bootstrap · Aug 1, 2026
Input price$1.25/1M
seed-bootstrap · Aug 1, 2026
Output price$3.5/1M
seed-bootstrap · Aug 1, 2026
Context window128k
seed-bootstrap · Aug 1, 2026
Benchmark MetricReported ScoreObserved Source
Preference Elo1,370seed-bootstrap · Aug 1, 2026
Coding Elo1,385seed-bootstrap · Aug 1, 2026
LiveBench61.2%seed-bootstrap · Aug 1, 2026
SWE-bench58.4%seed-bootstrap · Aug 1, 2026
GPQA Diamond75.2%seed-bootstrap · Aug 1, 2026
Time to first token360 msseed-bootstrap · Aug 1, 2026
Output speed42 tok/sseed-bootstrap · Aug 1, 2026
Input price$1.25/1Mseed-bootstrap · Aug 1, 2026
Output price$3.5/1Mseed-bootstrap · Aug 1, 2026
Context window128kseed-bootstrap · Aug 1, 2026

Compare with every model

Search or pick any catalog row. Suggested matchups first, then the full list.

Dedicated vs hub →
Llama 3.1 405B vs Llama 3.1 70B (next llama)Llama 3.1 405B vs DeepSeek Coder V2Llama 3.1 405B vs Claude 3.7 SonnetLlama 3.1 405B vs Doubao Lite 1.5Llama 3.1 405B vs DeepSeek R1Llama 3.1 405B vs Gemini 2.5 Pro
Showing 69 of 69 comparisons
Llama 3.1 405B vs Claude Opus 5Anthropic
Compare

Anthropic current default flagship. Official API $5/$25 per 1M tokens and a 1M context window (Anthropic, Jul 24 2026).

Elo: −254SWE: −20.8%
Llama 3.1 405B vs Claude Fable 5Anthropic
Compare

Anthropic top-tier long-horizon model. Official API $10/$50 per 1M tokens (Claude Platform pricing, Aug 2026).

Elo: −246SWE: −21.6%
Llama 3.1 405B vs GPT-5.6 SolOpenAI
Compare

OpenAI 5.6 flagship tier. Official API $5/$30 per 1M tokens (OpenAI pricing, Jul 30 2026 update left Sol unchanged).

Elo: −238SWE: −19.2%
Llama 3.1 405B vs Claude Opus 4.8Anthropic
Compare

Prior Opus generation still billed at $5/$25. Kept as a compare baseline against Opus 5.

Elo: −228SWE: −20%
Llama 3.1 405B vs Grok 4.6xAI
Compare

xAI Aug 12 2026 post-training refresh of Grok 4.5. Same $2/$6 API price, 500k context, stronger agentic traces.

Elo: −222SWE: −10.7%
Llama 3.1 405B vs Claude Opus 4.6Anthropic
Compare

Follow-on Opus release. Slightly behind 4.5 on official SWE-bench bash-only in the last published sweep; stronger long-horizon agent traces.

Elo: −204SWE: −17.5%
Llama 3.1 405B vs Gemini 3.6 ProGoogle
Compare

Current Google Pro-class multimodal model. Long context, strong coding, billed like the 3.x Pro tier.

Elo: −200SWE: −16.2%
Llama 3.1 405B vs Claude Opus 4.5Anthropic
Compare

Anthropic frontier coding and computer-use model. SWE-bench leader on the official mini-SWE-agent harness in the Feb 2026 refresh.

Elo: −198SWE: −18.4%
Llama 3.1 405B vs OpenAI: o3 MiniOpenAI
Compare

Auto-discovered from OpenRouter (openai/o3-mini). Preview until a second source matches.

Elo: −190SWE: −20.1%
Llama 3.1 405B vs GPT-5OpenAI
Compare

OpenAI flagship reasoning model for 2025–26. Strong general preference Elo and multimodal coverage.

Elo: −188SWE: −10%
Llama 3.1 405B vs GLM-5.3Zhipu
Compare

Z.ai Aug 14 2026 post-train of the GLM-5.2 744B base. Coding-plan live; open weights promised after a two-week safety review (z.ai/blog/glm-5.3).

Elo: −188SWE: −18%
Llama 3.1 405B vs Claude Sonnet 5Anthropic
Compare

Anthropic workhorse. Official $2/$10 per 1M tokens made permanent on Aug 10 2026.

Elo: −186SWE: −15.4%
Llama 3.1 405B vs Gemini 3 ProGoogle
Compare

Google frontier multimodal model with a multi-million-token context window.

Elo: −182SWE: −14%
Llama 3.1 405B vs GPT-5.6 TerraOpenAI
Compare

OpenAI 5.6 mid tier. Official API $2/$12 per 1M after the Jul 30 2026 price cut.

Elo: −178SWE: −12%
Llama 3.1 405B vs GPT-4.5 OrionOpenAI
Compare

OpenAI largest dense non-reasoning model with expansive world knowledge and reduced hallucinations.

Elo: −170SWE: −12.6%
Llama 3.1 405B vs DeepSeek V4 ProDeepSeek
Compare

Open-weight-adjacent DeepSeek flagship. High reasoning density per dollar.

Elo: −166SWE: −13.2%
Llama 3.1 405B vs Gemini 3.7 FlashGoogle
Compare

Google Aug 13 2026 workhorse. Official intro price $0.75/$3.75 per 1M through Dec 31 2026; 1,048,576-token context (Google blog).

Elo: −160SWE: −14%
Llama 3.1 405B vs Kimi K3Moonshot
Compare

Moonshot AI frontier flagship reasoning and agent swarm model with 256k context and top-tier SWE-bench coding capability.

Elo: −158SWE: −15.4%
Llama 3.1 405B vs Claude Sonnet 4.5Anthropic
Compare

Workhorse Anthropic model: most of Opus coding quality at a mid-tier price.

Elo: −154SWE: −11.7%
Llama 3.1 405B vs Qwen 3 MaxAlibaba
Compare

Alibaba flagship. Strong math and multilingual code.

Elo: −148SWE: −9.4%
Llama 3.1 405B vs MoonshotAI: Kimi K2.5Moonshot
Compare

Auto-discovered from OpenRouter (moonshotai/kimi-k2.5). Preview until a second source matches.

Elo: −145SWE: −12.9%
Llama 3.1 405B vs OpenAI: o1OpenAI
Compare

Auto-discovered from OpenRouter (openai/o1). Preview until a second source matches.

Elo: −142SWE: +9.5%
Llama 3.1 405B vs Gemini 3.6 FlashGoogle
Compare

Google Jul 21 workhorse. Now shares the 3.7 Flash introductory $0.75/$3.75 rate through Dec 31 2026.

Elo: −136SWE: −12.4%
Llama 3.1 405B vs Gemini 3 FlashGoogle
Compare

Fast Google frontier-adjacent model. Near-top official SWE-bench at a fraction of Opus price.

Elo: −125SWE: −17.4%
Llama 3.1 405B vs Qwen QwQ 32BAlibaba
Compare

Alibaba specialized open reasoning model competing with frontier closed reasoning models.

Elo: −125SWE: −9.1%
Llama 3.1 405B vs GLM-5.2Zhipu
Compare

Zhipu flagship. Strong Chinese/English coding and agents.

Elo: −122SWE: −10.9%
Llama 3.1 405B vs Gemini 2.0 Flash ThinkingGoogle
Compare

Google experimental reasoning model that visualizes thoughts in real-time.

Elo: −120SWE: −8.4%
Llama 3.1 405B vs DeepSeek V4 FlashDeepSeek
Compare

DeepSeek Jul 31 2026 price-performance SKU. Public listings put it near $0.14/$0.28 per 1M tokens.

Elo: −120SWE: −12.8%
Llama 3.1 405B vs Claude Opus 4Anthropic
Compare

First Claude 4 Opus generation. Baseline for opus 4 vs opus 5.

Elo: −120SWE: −14.1%
Llama 3.1 405B vs Grok 4xAI
Compare

Previous xAI flagship.

Elo: −118SWE: −0.2%
Llama 3.1 405B vs MiniMax M2.5MiniMax
Compare

MiniMax coding model. Tied near the top of official SWE-bench bash-only in Feb 2026.

Elo: −108SWE: −17.4%
Llama 3.1 405B vs Yi-Lightning01.AI
Compare

01.AI ultra-fast reasoning model delivering top LiveBench efficiency.

Elo: −105SWE: −5%
Llama 3.1 405B vs Seed 2.1 TurboByteDance
Compare

ByteDance Seed 2.1 Turbo, listed on public model timelines as an Aug 10 2026 API drop.

Elo: −102SWE: −4.8%
Llama 3.1 405B vs Doubao Pro 1.5ByteDance
Compare

ByteDance flagship enterprise model with ultra-low token cost and 128k context.

Elo: −100SWE: −3.7%
Llama 3.1 405B vs Llama 4 MaverickMeta
Compare

Meta natively multimodal open-weight flagship.

Elo: −98SWE: +1.3%
Llama 3.1 405B vs GPT-5.6 LunaOpenAI
Compare

OpenAI 5.6 fast/cheap tier. Official API $0.20/$1.20 per 1M after the Jul 30 80% Luna cut.

Elo: −96SWE: −3.4%
Llama 3.1 405B vs MoonshotAI: Kimi K2 0711Moonshot
Compare

Auto-discovered from OpenRouter (moonshotai/kimi-k2). Preview until a second source matches.

Elo: −95SWE: −7.4%
Llama 3.1 405B vs Mistral Large 3Mistral
Compare

Mistral European flagship with strong function calling.

Elo: −86SWE: +3%
Llama 3.1 405B vs Claude Sonnet 4Anthropic
Compare

First Sonnet 4 generation. Bridge between 3.5/3.7 and Sonnet 5.

Elo: −85SWE: −4.4%
Llama 3.1 405B vs Ernie 4.5 TurboBaidu
Compare

Baidu current multimodal enterprise foundation model with broad Chinese knowledge.

Elo: −80SWE: +1.4%
Llama 3.1 405B vs Qwen 2.5 PlusAlibaba
Compare

Alibaba balanced flagship API model with high-throughput general reasoning.

Elo: −75SWE: −0.8%
Llama 3.1 405B vs OpenAI o1-miniOpenAI
Compare

OpenAI high-speed, cost-effective reasoning model optimized for STEM, math, and code generation.

Elo: −75SWE: +2%
Llama 3.1 405B vs Qwen3 235BAlibaba
Compare

Open-weight Qwen3 mixture-of-experts.

Elo: −70SWE: −1%
Llama 3.1 405B vs Claude Haiku 4.5Anthropic
Compare

Anthropic cheap/fast Claude SKU. Official Claude Platform list price $1/$5 per 1M tokens (Anthropic Haiku page).

Elo: −68SWE: +0.2%
Llama 3.1 405B vs Yi-Large01.AI
Compare

01.AI full-scale dense model for complex instruction following.

Elo: −60SWE: +4.6%
Llama 3.1 405B vs Qwen 2.5 Coder 32BAlibaba
Compare

Alibaba dedicated open-weight code generation model with near-frontier SWE-bench Verified coding capability.

Elo: −55SWE: −6.8%
Llama 3.1 405B vs Kimi Chat 1.5Moonshot
Compare

Moonshot ultra-long context model supporting up to 2 million tokens per request.

Elo: −50SWE: +7.4%
Llama 3.1 405B vs Llama 4 ScoutMeta
Compare

Meta open-weight Llama 4 long-context sibling of Maverick. Common public API lists sit near $0.08–$0.30 / $0.30–$0.70 per 1M; we store a conservative hosted list until OpenRouter overwrites.

Elo: −42SWE: +6%
Llama 3.1 405B vs GPT-5 miniOpenAI
Compare

Cost-efficient GPT-5 distill for high-volume agents.

Elo: −40SWE: +6%
Llama 3.1 405B vs Grok 3xAI
Compare

Previous xAI generation before Grok 4. Kept for grok 3 vs grok 4.

Elo: −35SWE: +7%
Llama 3.1 405B vs Qwen3.8 27BAlibaba
Compare

Alibaba open-weight 27B drop dated Aug 14 2026. Dense enough to self-host; not a frontier MoE.

Elo: −28SWE: −0.4%
Llama 3.1 405B vs DeepSeek Coder V2DeepSeek
Compare

DeepSeek open-weight Mixture-of-Experts coding model supporting 338 programming languages and 128k context.

Elo: +5SWE: −2.1%
Llama 3.1 405B vs Claude 3.7 SonnetAnthropic
Compare

Hybrid-reasoning Sonnet from 2025. Kept for historical compare pages.

Elo: +8SWE: −11.9%
Llama 3.1 405B vs Doubao Lite 1.5ByteDance
Compare

ByteDance high-speed lightweight model priced at sub-cent levels.

Elo: +10SWE: +12.4%
Llama 3.1 405B vs DeepSeek R1DeepSeek
Compare

Open-weights reasoning model trained with large-scale RL.

Elo: +12SWE: −6.8%
Llama 3.1 405B vs Gemini 2.5 ProGoogle
Compare

Previous Google long-context flagship.

Elo: +20SWE: −5.4%
Llama 3.1 405B vs Command ACohere
Compare

Cohere enterprise RAG and tool-use model.

Elo: +26SWE: +15.8%
Llama 3.1 405B vs GPT-4oOpenAI
Compare

Previous OpenAI flagship. Still a common compare baseline on legacy pages.

Elo: +35SWE: +3.6%
Llama 3.1 405B vs Codestral 25.01Mistral
Compare

Mistral code-specialist model.

Elo: +50SWE: +6.6%
Llama 3.1 405B vs DeepSeek V3DeepSeek
Compare

Prior DeepSeek flagship. Baseline for v3 vs v4.

Elo: +60SWE: +9.8%
Llama 3.1 405B vs Gemini 2.5 FlashGoogle
Compare

Previous Google speed workhorse.

Elo: +75SWE: +10.4%
Llama 3.1 405B vs Llama 3.3 70BMeta
Compare

Previous Meta 70B open-weight workhorse.

Elo: +85SWE: +13.3%
Llama 3.1 405B vs Claude 3.5 SonnetAnthropic
Compare

2024 workhorse. Still a high-intent compare against GPT-4o.

Elo: +90SWE: +9.4%
Llama 3.1 405B vs GPT-4o miniOpenAI
Compare

Legacy small OpenAI model. Useful as a cheap baseline.

Elo: +98SWE: +17.2%
Llama 3.1 405B vs Gemini 1.5 ProGoogle
Compare

First million-token Gemini Pro. Baseline for 1.5 vs 2.5 vs 3.x Pro.

Elo: +110SWE: +20.4%
Llama 3.1 405B vs GPT-4 TurboOpenAI
Compare

GPT-4 Turbo 128k. Historical flagship for gpt-4 turbo vs gpt-4o / gpt-5.

Elo: +115SWE: +25.2%
Llama 3.1 405B vs Claude 3 OpusAnthropic
Compare

Original Claude 3 flagship. Kept so opus 3 vs later Opus and vs GPT-4o still resolve.

Elo: +122SWE: +20%
Llama 3.1 405B vs Llama 3.1 70BMeta
Compare

Llama 3.1 70B instruct. Predecessor to 3.3 70B and Llama 4.

Elo: +130SWE: +18.2%
Llama 3.1 405B vs Claude 3.5 HaikuAnthropic
Compare

Previous cheap Claude. Haiku 4.5 is the current $1/$5 SKU.

Elo: +146SWE: +22.2%

Frequently asked questions

Plain-English methodology and leaderboard answers

Llama 3.1 405B is a Meta open-weight model. Meta flagship open-weight 405B dense foundation model with 128k context window.

Elo is a crowd vote on which hidden answer people liked more — not a school test. What is Elo?