Pairwise benchmark snapshot · Aug 16, 2026

DeepSeek V3 vs GPT-4.5 Orion benchmark

Name: DeepSeek V3 vs GPT-4.5 Orion AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares DeepSeek V3 (DeepSeek) and GPT-4.5 Orion (OpenAI) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, GPT-4.5 Orion is ahead by 230 points (1,540 vs 1,310; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, GPT-4.5 Orion resolves 71% versus 48.6% (seed-bootstrap (Aug 1, 2026)). DeepSeek V3 streams faster (66 tok/s) while DeepSeek V3 is the cheaper output token ($1.03/1M). DeepSeek V3 has the larger context window (164k tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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DeepSeek

DeepSeek V3

Prior DeepSeek flagship. Baseline for v3 vs v4.

Elo 1,310$1.0287/1M out

OpenAI

GPT-4.5 Orion

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

Elo 1,540$150/1M out

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Instant pairwise benchmark recalculation across 400+ LLMs

Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

DeepSeek V3 (4)vsGPT-4.5 Orion (6)

DeepSeek V3: 4W (40%)Overall: GPT-4.5 OrionGPT-4.5 Orion: 6W (60%)

← DeepSeek V3GPT-4.5 Orion →

GPT-4.5 Orion (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,310vs1,540

Coding Elo

—vs1,520

SWE-bench

48.6%vs71%

LiveBench

55.4%vs68.5%

GPQA Diamond

59.1%vs84%

DeepSeek V3: 0WGPT-4.5 Orion: 5W

Tied (1/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

66 tok/svs60 tok/s

Time to first token

380 msvs350 ms

DeepSeek V3: 1WGPT-4.5 Orion: 1W

DeepSeek V3 (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$1.03/1Mvs$150/1M

Input price

$0.26/1Mvs$75/1M

Context window

164kvs128k

DeepSeek V3: 3WGPT-4.5 Orion: 0W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageEven 3–3

Preference Elo

GPT-4.5 Orion

230 pts advantage

Throughput Speed

DeepSeek V3

6 tok/s faster

Price Efficiency

DeepSeek V3

$148.97/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,310

EloHigh is better

1,540+18%

Code Elo

High is better

—

Code EloHigh is better

1,520

LiveBench

High is better

55.4%

LiveBenchHigh is better

68.5%+24%

SWE-bench

High is better

48.6%

SWE-benchHigh is better

71%+46%

GPQA

High is better

59.1%

GPQAHigh is better

84%+42%

TTFT

Low is better

380 ms

TTFTLow is better

350 ms+9%

Speed

High is better

+10%66 tok/s

SpeedHigh is better

60 tok/s

In $

Low is better

+29038%$0.26/1M

In $Low is better

$75/1M

Out $

Low is better

+14482%$1.03/1M

Out $Low is better

$150/1M

Context

High is better

+28%164k

ContextHigh is better

128k

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 99% with DeepSeek V3

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

DeepSeek V3$24.44 / mo

In: $9.01Out: $15.43

GPT-4.5 Orion$4,875.00 / mo

In: $2625.00Out: $2250.00

Estimated Cost Delta

DeepSeek V3 is estimated to save $4,850.56/month ($58,207/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
GPT-4.5 Orion:Pick GPT-4.5 Orion when repo-level coding accuracy is the constraint.
2
DeepSeek V3:Pick DeepSeek V3 when you are optimizing output cost.
3
GPT-4.5 Orion:Pick GPT-4.5 Orion when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsGPT-4.5 Orion

Higher SWE-bench (71%).

High-volume chatDeepSeek V3

Lower output list price ($1.03/1M).

Voice / low-latency UIGPT-4.5 Orion

Lower TTFT (350 ms).

Long-document RAGDeepSeek V3

Larger window (164k).

Screenshots / visionGPT-4.5 Orion

GPT-4.5 Orion is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	GPT-4.5 Orion	Higher SWE-bench (71%).
High-volume chat	DeepSeek V3	Lower output list price ($1.03/1M).
Voice / low-latency UI	GPT-4.5 Orion	Lower TTFT (350 ms).
Long-document RAG	DeepSeek V3	Larger window (164k).
Screenshots / vision	GPT-4.5 Orion	GPT-4.5 Orion is the side marked multimodal in the catalog.

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CompareLLM Matrix

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LIVE

DeepSeek

DeepSeek V3

Elo 1,310

LiveBench55.4%

SWE-bench48.6%

Speed66 tok/s

Output cost$1.03/1M

OpenAI

GPT-4.5 Orion

Elo 1,540

LiveBench68.5%

SWE-bench71%

Speed60 tok/s

Output cost$150/1M

Frequently Asked Questions

Which is better overall, DeepSeek V3 or GPT-4.5 Orion?: GPT-4.5 Orion has the higher preference Elo in our latest snapshot (1,540). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, DeepSeek V3 or GPT-4.5 Orion?: GPT-4.5 Orion leads SWE-bench at 71% vs 48.6%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: DeepSeek V3 output tokens are $1.03/1M versus $150/1M. Input prices and retry rates still move the real bill.
Which is faster, DeepSeek V3 or GPT-4.5 Orion?: GPT-4.5 Orion has the lower time-to-first-token (350 ms vs 380 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: DeepSeek V3 accepts 164k tokens versus 128k.
Can I self-host either model?: DeepSeek V3 is marked open-weights in our catalog. The other side is a closed API. Check the provider license before you ship weights.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. DeepSeek V3 and GPT-4.5 Orion Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All DeepSeek V3 matchups →|All GPT-4.5 Orion matchups →

DeepSeek V3 vs DeepSeek Coder V2 (previous deepseek)DeepSeek V3 vs DeepSeek R1 (next deepseek)GPT-4.5 Orion vs OpenAI: o1 (previous gpt-flagship)GPT-4.5 Orion vs GPT-5 (next gpt-flagship)DeepSeek V4 Pro vs GPT-4.5 Orion GPT-5.6 Sol vs GPT-4.5 Orion

DeepSeek V3 vs GPT-4.5 Orion benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

DeepSeek V3 (4)vsGPT-4.5 Orion (6)

DeepSeek V3: 4W (40%)Overall: GPT-4.5 OrionGPT-4.5 Orion: 6W (60%)

← DeepSeek V3GPT-4.5 Orion →

GPT-4.5 Orion (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,310vs1,540

Coding Elo

—vs1,520

SWE-bench

48.6%vs71%

LiveBench

55.4%vs68.5%

GPQA Diamond

59.1%vs84%

DeepSeek V3: 0WGPT-4.5 Orion: 5W

Tied (1/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

66 tok/svs60 tok/s

Time to first token

380 msvs350 ms

DeepSeek V3: 1WGPT-4.5 Orion: 1W

DeepSeek V3 (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$1.03/1Mvs$150/1M

Input price

$0.26/1Mvs$75/1M

Context window

164kvs128k

DeepSeek V3: 3WGPT-4.5 Orion: 0W

Recommended Workload Routing

Repo / coding agentsGPT-4.5 Orion

Higher SWE-bench (71%).

High-volume chatDeepSeek V3

Lower output list price ($1.03/1M).

Voice / low-latency UIGPT-4.5 Orion

Lower TTFT (350 ms).

Long-document RAGDeepSeek V3

Larger window (164k).

Screenshots / visionGPT-4.5 Orion

GPT-4.5 Orion is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	GPT-4.5 Orion	Higher SWE-bench (71%).
High-volume chat	DeepSeek V3	Lower output list price ($1.03/1M).
Voice / low-latency UI	GPT-4.5 Orion	Lower TTFT (350 ms).
Long-document RAG	DeepSeek V3	Larger window (164k).
Screenshots / vision	GPT-4.5 Orion	GPT-4.5 Orion is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, DeepSeek V3 or GPT-4.5 Orion?

GPT-4.5 Orion has the higher preference Elo in our latest snapshot (1,540). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, DeepSeek V3 or GPT-4.5 Orion?

GPT-4.5 Orion leads SWE-bench at 71% vs 48.6%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

DeepSeek V3 output tokens are $1.03/1M versus $150/1M. Input prices and retry rates still move the real bill.

Which is faster, DeepSeek V3 or GPT-4.5 Orion?

GPT-4.5 Orion has the lower time-to-first-token (350 ms vs 380 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

DeepSeek V3 accepts 164k tokens versus 128k.

Can I self-host either model?

DeepSeek V3 is marked open-weights in our catalog. The other side is a closed API. Check the provider license before you ship weights.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. DeepSeek V3 and GPT-4.5 Orion Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.